Hi

I have 3 textboxes in UserForm where user inputs value and the sum must
always add up to 100. If any 2 textboxes have valid input, the third will be
filled in automatically.

Here is my attempt using nested IF, but I doubt I'm declaring my textboxes
or used the "IsEmpty" function correctly here because type mismatch error
occurs...Can someone please help me making it work?

Note: The following code relates to first textbox (txtSilt) only. Codes for
the other 2 textboxes are similar and I'll post them if it helps.

Private Sub txtSilt_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)

' Declare 3 textboxes (txtSilt, txtSand, txtClay)
Dim NumtxtSilt As Variant, NumtxtSand As Variant, NumtxtClay As Variant
NumtxtSilt = Me.txtSilt.Value
NumtxtSand = Me.txtSand.Value
NumtxtClay = Me.txtClay.Value

' If the input is NOT numerical, show warning label,
' show and copy null value to worksheet, by calling sub CopySiltEmpty
If Not IsNumeric(NumtxtSilt) Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- You must enter a NUMBER"
CopySiltEmpty

' Or if the sum of Silt and Sand is within 100%,
' hide warning label, show and copy both Silt and calculated Clay
value
' to worksheet, by calling sub CopySilt and sub CopyClay
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand <= 100 Then
NumtxtClay = 100 - NumtxtSilt - NumtxtSand
CopySilt
CopyClay

' Or if the sum of Silt and Sand exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite percentage
must add up to 100%"
CopySiltEmpty

' Or if the sum of Silt and Clay is within 100%,
' show and copy both Silt and calculated Sand values to worksheet
' by calling sub CopySilt and sub CopySand
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay <= 100 Then
NumtxtSand = 100 - NumtxtSilt - NumtxtClay
CopySilt
CopySand

' Or if the sum of Silt and Clay exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite percentage
must add up to 100%"
CopySiltEmpty

' Or if the input is outside 0 and 100, show warning label,
' show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf NumtxtSilt < 0 Or NumtxtSilt 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Please enter a number between 0
and 100"
CopySiltEmpty

' Else hide warning label, show and copy data to worksheet
' by calling sub CopySilt
Else
CopySilt

End If

End Sub

' Below is stored in Module 1
Sub CopySiltEmpty()

Dim ws As Worksheet
Dim rngSilt As Range
Dim NumtxtSilt As Variant

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Clear input and change textbox BackColor to yellow
NumtxtSilt = frmUSLE.txtSilt.Value
NumtxtSilt = Empty
frmUSLE.txtSilt.Value = Empty
frmUSLE.txtSilt.BackColor = &HFFFF&

' Copy empty value to the worksheet
rngSilt.Value = Empty

End Sub

' Below is stored in Module 1
Sub CopySilt()

Dim ws As Worksheet
Dim rngSilt As Range

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Set textbox format to one decimal point
frmUSLE.txtSilt.Text = Format(frmUSLE.txtSilt.Text, "#,##0.0")

' Copy the data to the worksheet
rngSilt.Value = frmUSLE.txtSilt.Value

' Hide warning label, change textbox BackColor to white
frmUSLE.labSiltWarning.Visible = False
frmUSLE.txtSilt.BackColor = &H80000005

End Sub

IsEmpty is only useful to see if a Variant variable in not yet initialize
(that is, Dim'med, but with nothing assigned to it yet). I would Dim the
NumtxtSilt, NumtxtSand and NumtxtClay variables as Strings and test it for
"no text" this way...

If Len(NumtxtSilt) 0 Then
' Variable has text in it
Else
' Variable has no text in it
End If

As for your use of IsNumeric, consider the following message I've posted in
the past....

IsNumeric is not a very good "number proofer" given what most programmers
expect it to do. Perhaps you will find the following which I have posted in
the past to the compiled VB newsgroups (but which applies equally to the VBA
world as well)...

I usually try and steer people away from using IsNumeric to "proof"
supposedly numeric text. Consider this (also see note below):

ReturnValue = IsNumeric("($1,23,,3.4,,,5,,E67$)")

Most people would not expect THAT to return True. IsNumeric has some "flaws"
in what it considers a proper number and what most programmers are looking
for.

I had a short tip published by Pinnacle Publishing in their Visual Basic
Developer magazine that covered some of these flaws. Originally, the tip was
free to view but is now viewable only by subscribers.. Basically, it said
that IsNumeric returned True for things like -- currency symbols being
located in front or in back of the number as shown in my example (also
applies to plus, minus and blanks too); numbers surrounded by parentheses as
shown in my example (some people use these to mark negative numbers);
numbers containing any number of commas before a decimal point as shown in
my example; numbers in scientific notation (a number followed by an upper or
lower case "D" or "E", followed by a number equal to or less than 305 -- the
maximum power of 10 in VB); and Octal/Hexadecimal numbers (&H for
Hexadecimal, &O or just & in front of the number for Octal).

NOTE:
======
In the above example and in the referenced tip, I refer to $ signs and
commas and dots -- these were meant to refer to your currency, thousands
separator and decimal point symbols as defined in your local settings --
substitute your local regional symbols for these if appropriate.

As for your question about checking numbers, here are two functions that I
have posted in the past for similar questions..... one is for digits only
and the other is for "regular" numbers:

Function IsDigitsOnly(Value As String) As Boolean
IsDigitsOnly = Len(Value) 0 And _
Not Value Like "*[!0-9]*"
End Function

Function IsNumber(ByVal Value As String) As Boolean
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9.]*" And _
Not Value Like "*.*.*" And _
Len(Value) 0 And Value < "." And _
Value < vbNullString
End Function

Here are revisions to the above functions that deal with the local settings
for decimal points (and thousand's separators) that are different than used
in the US (this code works in the US too, of course).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

I'm not as concerned by the rejection of entries that include one or more
thousand's separators, but we can handle this if we don't insist on the
thousand's separator being located in the correct positions (in other words,
we'll allow the user to include them for their own purposes... we'll just
tolerate their presence).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
Dim TS As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Get local setting for thousand's separator
' and eliminate them. Remove the next two lines
' if you don't want your users being able to
' type in the thousands separator at all.
TS = Mid$(Format$(1000, "#,###"), 2, 1)
Value = Replace$(Value, TS, "")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

Rick



"Sam Kuo" wrote in message
...
Hi

I have 3 textboxes in UserForm where user inputs value and the sum must
always add up to 100. If any 2 textboxes have valid input, the third will
be
filled in automatically.

Here is my attempt using nested IF, but I doubt I'm declaring my textboxes
or used the "IsEmpty" function correctly here because type mismatch error
occurs...Can someone please help me making it work?

Note: The following code relates to first textbox (txtSilt) only. Codes
for
the other 2 textboxes are similar and I'll post them if it helps.

Private Sub txtSilt_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)

' Declare 3 textboxes (txtSilt, txtSand, txtClay)
Dim NumtxtSilt As Variant, NumtxtSand As Variant, NumtxtClay As Variant
NumtxtSilt = Me.txtSilt.Value
NumtxtSand = Me.txtSand.Value
NumtxtClay = Me.txtClay.Value

' If the input is NOT numerical, show warning label,
' show and copy null value to worksheet, by calling sub CopySiltEmpty
If Not IsNumeric(NumtxtSilt) Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- You must enter a NUMBER"
CopySiltEmpty

' Or if the sum of Silt and Sand is within 100%,
' hide warning label, show and copy both Silt and calculated Clay
value
' to worksheet, by calling sub CopySilt and sub CopyClay
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand <= 100 Then
NumtxtClay = 100 - NumtxtSilt - NumtxtSand
CopySilt
CopyClay

' Or if the sum of Silt and Sand exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the sum of Silt and Clay is within 100%,
' show and copy both Silt and calculated Sand values to worksheet
' by calling sub CopySilt and sub CopySand
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay <= 100 Then
NumtxtSand = 100 - NumtxtSilt - NumtxtClay
CopySilt
CopySand

' Or if the sum of Silt and Clay exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the input is outside 0 and 100, show warning label,
' show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf NumtxtSilt < 0 Or NumtxtSilt 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Please enter a number between
0
and 100"
CopySiltEmpty

' Else hide warning label, show and copy data to worksheet
' by calling sub CopySilt
Else
CopySilt

End If

End Sub

' Below is stored in Module 1
Sub CopySiltEmpty()

Dim ws As Worksheet
Dim rngSilt As Range
Dim NumtxtSilt As Variant

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Clear input and change textbox BackColor to yellow
NumtxtSilt = frmUSLE.txtSilt.Value
NumtxtSilt = Empty
frmUSLE.txtSilt.Value = Empty
frmUSLE.txtSilt.BackColor = &HFFFF&

' Copy empty value to the worksheet
rngSilt.Value = Empty

End Sub

' Below is stored in Module 1
Sub CopySilt()

Dim ws As Worksheet
Dim rngSilt As Range

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Set textbox format to one decimal point
frmUSLE.txtSilt.Text = Format(frmUSLE.txtSilt.Text, "#,##0.0")

' Copy the data to the worksheet
rngSilt.Value = frmUSLE.txtSilt.Value

' Hide warning label, change textbox BackColor to white
frmUSLE.labSiltWarning.Visible = False
frmUSLE.txtSilt.BackColor = &H80000005

End Sub

Thanks Rick. I'll give it a shot :-)

Just before I do, do you mind explain how I should incorporate your IsNumber
function to my code and where to put it (sorry I'm a newbie in programming as
you can tell)?

Basically the value can only be positive (including 0) and upto 100
(formated to 1 decimal point).

Thanks
Sam

"Rick Rothstein (MVP - VB)" wrote:

IsEmpty is only useful to see if a Variant variable in not yet initialize
(that is, Dim'med, but with nothing assigned to it yet). I would Dim the
NumtxtSilt, NumtxtSand and NumtxtClay variables as Strings and test it for
"no text" this way...

If Len(NumtxtSilt) 0 Then
' Variable has text in it
Else
' Variable has no text in it
End If

As for your use of IsNumeric, consider the following message I've posted in
the past....

IsNumeric is not a very good "number proofer" given what most programmers
expect it to do. Perhaps you will find the following which I have posted in
the past to the compiled VB newsgroups (but which applies equally to the VBA
world as well)...

I usually try and steer people away from using IsNumeric to "proof"
supposedly numeric text. Consider this (also see note below):

ReturnValue = IsNumeric("($1,23,,3.4,,,5,,E67$)")

Most people would not expect THAT to return True. IsNumeric has some "flaws"
in what it considers a proper number and what most programmers are looking
for.

I had a short tip published by Pinnacle Publishing in their Visual Basic
Developer magazine that covered some of these flaws. Originally, the tip was
free to view but is now viewable only by subscribers.. Basically, it said
that IsNumeric returned True for things like -- currency symbols being
located in front or in back of the number as shown in my example (also
applies to plus, minus and blanks too); numbers surrounded by parentheses as
shown in my example (some people use these to mark negative numbers);
numbers containing any number of commas before a decimal point as shown in
my example; numbers in scientific notation (a number followed by an upper or
lower case "D" or "E", followed by a number equal to or less than 305 -- the
maximum power of 10 in VB); and Octal/Hexadecimal numbers (&H for
Hexadecimal, &O or just & in front of the number for Octal).

NOTE:
======
In the above example and in the referenced tip, I refer to $ signs and
commas and dots -- these were meant to refer to your currency, thousands
separator and decimal point symbols as defined in your local settings --
substitute your local regional symbols for these if appropriate.

As for your question about checking numbers, here are two functions that I
have posted in the past for similar questions..... one is for digits only
and the other is for "regular" numbers:

Function IsDigitsOnly(Value As String) As Boolean
IsDigitsOnly = Len(Value) 0 And _
Not Value Like "*[!0-9]*"
End Function

Function IsNumber(ByVal Value As String) As Boolean
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9.]*" And _
Not Value Like "*.*.*" And _
Len(Value) 0 And Value < "." And _
Value < vbNullString
End Function

Here are revisions to the above functions that deal with the local settings
for decimal points (and thousand's separators) that are different than used
in the US (this code works in the US too, of course).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

I'm not as concerned by the rejection of entries that include one or more
thousand's separators, but we can handle this if we don't insist on the
thousand's separator being located in the correct positions (in other words,
we'll allow the user to include them for their own purposes... we'll just
tolerate their presence).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
Dim TS As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Get local setting for thousand's separator
' and eliminate them. Remove the next two lines
' if you don't want your users being able to
' type in the thousands separator at all.
TS = Mid$(Format$(1000, "#,###"), 2, 1)
Value = Replace$(Value, TS, "")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

Rick



"Sam Kuo" wrote in message
...
Hi

I have 3 textboxes in UserForm where user inputs value and the sum must
always add up to 100. If any 2 textboxes have valid input, the third will
be
filled in automatically.

Here is my attempt using nested IF, but I doubt I'm declaring my textboxes
or used the "IsEmpty" function correctly here because type mismatch error
occurs...Can someone please help me making it work?

Note: The following code relates to first textbox (txtSilt) only. Codes
for
the other 2 textboxes are similar and I'll post them if it helps.

Private Sub txtSilt_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)

' Declare 3 textboxes (txtSilt, txtSand, txtClay)
Dim NumtxtSilt As Variant, NumtxtSand As Variant, NumtxtClay As Variant
NumtxtSilt = Me.txtSilt.Value
NumtxtSand = Me.txtSand.Value
NumtxtClay = Me.txtClay.Value

' If the input is NOT numerical, show warning label,
' show and copy null value to worksheet, by calling sub CopySiltEmpty
If Not IsNumeric(NumtxtSilt) Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- You must enter a NUMBER"
CopySiltEmpty

' Or if the sum of Silt and Sand is within 100%,
' hide warning label, show and copy both Silt and calculated Clay
value
' to worksheet, by calling sub CopySilt and sub CopyClay
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand <= 100 Then
NumtxtClay = 100 - NumtxtSilt - NumtxtSand
CopySilt
CopyClay

' Or if the sum of Silt and Sand exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the sum of Silt and Clay is within 100%,
' show and copy both Silt and calculated Sand values to worksheet
' by calling sub CopySilt and sub CopySand
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay <= 100 Then
NumtxtSand = 100 - NumtxtSilt - NumtxtClay
CopySilt
CopySand

' Or if the sum of Silt and Clay exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the input is outside 0 and 100, show warning label,
' show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf NumtxtSilt < 0 Or NumtxtSilt 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Please enter a number between
0
and 100"
CopySiltEmpty

' Else hide warning label, show and copy data to worksheet
' by calling sub CopySilt
Else
CopySilt

End If

End Sub

' Below is stored in Module 1
Sub CopySiltEmpty()

Dim ws As Worksheet
Dim rngSilt As Range
Dim NumtxtSilt As Variant

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Clear input and change textbox BackColor to yellow
NumtxtSilt = frmUSLE.txtSilt.Value
NumtxtSilt = Empty
frmUSLE.txtSilt.Value = Empty
frmUSLE.txtSilt.BackColor = &HFFFF&

' Copy empty value to the worksheet
rngSilt.Value = Empty

End Sub

' Below is stored in Module 1
Sub CopySilt()

Dim ws As Worksheet
Dim rngSilt As Range

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Set textbox format to one decimal point
frmUSLE.txtSilt.Text = Format(frmUSLE.txtSilt.Text, "#,##0.0")

' Copy the data to the worksheet
rngSilt.Value = frmUSLE.txtSilt.Value

' Hide warning label, change textbox BackColor to white
frmUSLE.labSiltWarning.Visible = False
frmUSLE.txtSilt.BackColor = &H80000005

End Sub

Just put my IsNumber function in the Module along with your subroutines. As
for using it, change this line form your code...

If Not IsNumeric(NumtxtSilt) Then

to this instead....

If Not IsNumber(NumtxtSilt) Then

Rick


"Sam Kuo" wrote in message
...
Thanks Rick. I'll give it a shot :-)

Just before I do, do you mind explain how I should incorporate your
IsNumber
function to my code and where to put it (sorry I'm a newbie in programming
as
you can tell)?

Basically the value can only be positive (including 0) and upto 100
(formated to 1 decimal point).

Thanks
Sam

"Rick Rothstein (MVP - VB)" wrote:

IsEmpty is only useful to see if a Variant variable in not yet initialize
(that is, Dim'med, but with nothing assigned to it yet). I would Dim the
NumtxtSilt, NumtxtSand and NumtxtClay variables as Strings and test it
for
"no text" this way...

If Len(NumtxtSilt) 0 Then
' Variable has text in it
Else
' Variable has no text in it
End If

As for your use of IsNumeric, consider the following message I've posted
in
the past....

IsNumeric is not a very good "number proofer" given what most programmers
expect it to do. Perhaps you will find the following which I have posted
in
the past to the compiled VB newsgroups (but which applies equally to the
VBA
world as well)...

I usually try and steer people away from using IsNumeric to "proof"
supposedly numeric text. Consider this (also see note below):

ReturnValue = IsNumeric("($1,23,,3.4,,,5,,E67$)")

Most people would not expect THAT to return True. IsNumeric has some
"flaws"
in what it considers a proper number and what most programmers are
looking
for.

I had a short tip published by Pinnacle Publishing in their Visual Basic
Developer magazine that covered some of these flaws. Originally, the tip
was
free to view but is now viewable only by subscribers.. Basically, it said
that IsNumeric returned True for things like -- currency symbols being
located in front or in back of the number as shown in my example (also
applies to plus, minus and blanks too); numbers surrounded by parentheses
as
shown in my example (some people use these to mark negative numbers);
numbers containing any number of commas before a decimal point as shown
in
my example; numbers in scientific notation (a number followed by an upper
or
lower case "D" or "E", followed by a number equal to or less than 305 --
the
maximum power of 10 in VB); and Octal/Hexadecimal numbers (&H for
Hexadecimal, &O or just & in front of the number for Octal).

NOTE:
======
In the above example and in the referenced tip, I refer to $ signs and
commas and dots -- these were meant to refer to your currency, thousands
separator and decimal point symbols as defined in your local settings --
substitute your local regional symbols for these if appropriate.

As for your question about checking numbers, here are two functions that
I
have posted in the past for similar questions..... one is for digits only
and the other is for "regular" numbers:

Function IsDigitsOnly(Value As String) As Boolean
IsDigitsOnly = Len(Value) 0 And _
Not Value Like "*[!0-9]*"
End Function

Function IsNumber(ByVal Value As String) As Boolean
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9.]*" And _
Not Value Like "*.*.*" And _
Len(Value) 0 And Value < "." And _
Value < vbNullString
End Function

Here are revisions to the above functions that deal with the local
settings
for decimal points (and thousand's separators) that are different than
used
in the US (this code works in the US too, of course).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

I'm not as concerned by the rejection of entries that include one or more
thousand's separators, but we can handle this if we don't insist on the
thousand's separator being located in the correct positions (in other
words,
we'll allow the user to include them for their own purposes... we'll just
tolerate their presence).

Function IsNumber(ByVal Value As String) As Boolean
Dim DP As String
Dim TS As String
' Get local setting for decimal point
DP = Format$(0, ".")
' Get local setting for thousand's separator
' and eliminate them. Remove the next two lines
' if you don't want your users being able to
' type in the thousands separator at all.
TS = Mid$(Format$(1000, "#,###"), 2, 1)
Value = Replace$(Value, TS, "")
' Leave the next statement out if you don't
' want to provide for plus/minus signs
If Value Like "[+-]*" Then Value = Mid$(Value, 2)
IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _
Not Value Like "*" & DP & "*" & DP & "*" And _
Len(Value) 0 And Value < DP And _
Value < vbNullString
End Function

Rick



"Sam Kuo" wrote in message
...
Hi

I have 3 textboxes in UserForm where user inputs value and the sum must
always add up to 100. If any 2 textboxes have valid input, the third
will
be
filled in automatically.

Here is my attempt using nested IF, but I doubt I'm declaring my
textboxes
or used the "IsEmpty" function correctly here because type mismatch
error
occurs...Can someone please help me making it work?

Note: The following code relates to first textbox (txtSilt) only. Codes
for
the other 2 textboxes are similar and I'll post them if it helps.

Private Sub txtSilt_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)

' Declare 3 textboxes (txtSilt, txtSand, txtClay)
Dim NumtxtSilt As Variant, NumtxtSand As Variant, NumtxtClay As
Variant
NumtxtSilt = Me.txtSilt.Value
NumtxtSand = Me.txtSand.Value
NumtxtClay = Me.txtClay.Value

' If the input is NOT numerical, show warning label,
' show and copy null value to worksheet, by calling sub
CopySiltEmpty
If Not IsNumeric(NumtxtSilt) Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- You must enter a NUMBER"
CopySiltEmpty

' Or if the sum of Silt and Sand is within 100%,
' hide warning label, show and copy both Silt and calculated
Clay
value
' to worksheet, by calling sub CopySilt and sub CopyClay
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand <= 100 Then
NumtxtClay = 100 - NumtxtSilt - NumtxtSand
CopySilt
CopyClay

' Or if the sum of Silt and Sand exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtSand) And
NumtxtSilt + NumtxtSand 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the sum of Silt and Clay is within 100%,
' show and copy both Silt and calculated Sand values to
worksheet
' by calling sub CopySilt and sub CopySand
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay <= 100 Then
NumtxtSand = 100 - NumtxtSilt - NumtxtClay
CopySilt
CopySand

' Or if the sum of Silt and Clay exceeds 100%,
' show warning label, show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf Not IsEmpty(NumtxtSilt) And Not IsEmpty(NumtxtClay) And
NumtxtSilt + NumtxtClay 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Total soil composite
percentage
must add up to 100%"
CopySiltEmpty

' Or if the input is outside 0 and 100, show warning label,
' show and copy empty value to worksheet
' by calling sub CopySiltEmpty
ElseIf NumtxtSilt < 0 Or NumtxtSilt 100 Then
Me.labSiltWarning.Visible = True
Me.labSiltWarning.Caption = "<-- Please enter a number
between
0
and 100"
CopySiltEmpty

' Else hide warning label, show and copy data to worksheet
' by calling sub CopySilt
Else
CopySilt

End If

End Sub

' Below is stored in Module 1
Sub CopySiltEmpty()

Dim ws As Worksheet
Dim rngSilt As Range
Dim NumtxtSilt As Variant

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Clear input and change textbox BackColor to yellow
NumtxtSilt = frmUSLE.txtSilt.Value
NumtxtSilt = Empty
frmUSLE.txtSilt.Value = Empty
frmUSLE.txtSilt.BackColor = &HFFFF&

' Copy empty value to the worksheet
rngSilt.Value = Empty

End Sub

' Below is stored in Module 1
Sub CopySilt()

Dim ws As Worksheet
Dim rngSilt As Range

Set ws = ThisWorkbook.Worksheets("Form Control 1")
Set rngSilt = ws.Range("B4")

' Set textbox format to one decimal point
frmUSLE.txtSilt.Text = Format(frmUSLE.txtSilt.Text, "#,##0.0")

' Copy the data to the worksheet
rngSilt.Value = frmUSLE.txtSilt.Value

' Hide warning label, change textbox BackColor to white
frmUSLE.labSiltWarning.Visible = False
frmUSLE.txtSilt.BackColor = &H80000005

End Sub