I occasionally mke user-defined functions in VBA. I am trying to write a
function using the LOG10() function and the FIXED() function and I get an
error for both of these functions - - unlike when I use other canned
functions. Are there limitations to the functions I can use in a
user-defined function? LOG() works, so I can work around the LOG10()
function.

If you're trying to use the LOG10() function inside of a VBA module, well,
there ain't no such animal.

Static Function Log10(X)
Log10 = Log(X) / Log(10#)
End Function

There's some workaround code that will give you LOG10() using Log() (which
is available in VBA).
Similarly, there is no FIXED() in VBA - that's also a worksheet only
function. Closest thing in VBA is probably FIX(n) where n is a number, and
FIX(n) returns the integer portion of n.


"CH" wrote:

I occasionally mke user-defined functions in VBA. I am trying to write a
function using the LOG10() function and the FIXED() function and I get an
error for both of these functions - - unlike when I use other canned
functions. Are there limitations to the functions I can use in a
user-defined function? LOG() works, so I can work around the LOG10()
function.

LOG10 and FIXED are not VBA functions. Use Application.Worksheetfunction.LOG10 if you have to.

--
Kind regards,

Niek Otten
Microsoft MVP - Excel

"CH" wrote in message ...
|I occasionally mke user-defined functions in VBA. I am trying to write a
| function using the LOG10() function and the FIXED() function and I get an
| error for both of these functions - - unlike when I use other canned
| functions. Are there limitations to the functions I can use in a
| user-defined function? LOG() works, so I can work around the LOG10()
| function.

...using the LOG10() function and the FIXED() function and I get an
error for both of these functions

Sub Demo()
Debug.Print WorksheetFunction.Log10(100)
Debug.Print WorksheetFunction.Fixed(1 / 7, 2)
' or...
With WorksheetFunction
Debug.Print .Log10(100)
Debug.Print .Fixed(1 / 7, 2)
End With
End Sub

--
HTH :)
Dana DeLouis
Windows XP & Office 2003


"CH" wrote in message
...
I occasionally mke user-defined functions in VBA. I am trying to write a
function using the LOG10() function and the FIXED() function and I get an
error for both of these functions - - unlike when I use other canned
functions. Are there limitations to the functions I can use in a
user-defined function? LOG() works, so I can work around the LOG10()
function.

please see Neik's answer. You need write the full path reference when you use
worksheetfunction. Obviously, You lost key word "Application." before
"WorksheetFunction.Log10(100)"

"Dana DeLouis" wrote:

...using the LOG10() function and the FIXED() function and I get an
error for both of these functions

Sub Demo()
Debug.Print WorksheetFunction.Log10(100)
Debug.Print WorksheetFunction.Fixed(1 / 7, 2)
' or...
With WorksheetFunction
Debug.Print .Log10(100)
Debug.Print .Fixed(1 / 7, 2)
End With
End Sub

--
HTH :)
Dana DeLouis
Windows XP & Office 2003


"CH" wrote in message
...
I occasionally mke user-defined functions in VBA. I am trying to write a
function using the LOG10() function and the FIXED() function and I get an
error for both of these functions - - unlike when I use other canned
functions. Are there limitations to the functions I can use in a
user-defined function? LOG() works, so I can work around the LOG10()
function.