Maybe....

Replace this line:
Sheets("Income Expense 2007").Range("B7") = Tb1.Value

with this set of lines:

with Sheets("Income Expense 2007").range("B7")
if isnumeric(.value) then
.value = .value + Tb1.Value
end if
end with

An empty cell is treated as a numeric cell (value = 0) by VBA)

If that cell is not numeric, what should happen?

with Sheets("Income Expense 2007").range("B7")
if isnumeric(.value) then
.value = .value + Tb1.Value
else
.value = tbl.value
'or
'.value = "ERROR"
end if
end with


Hazel wrote:

Hi All

Using the following code below my userform adds to the designated sheet if
there is a value already in the cell is it possible for the new value added
in Tb1 to add to the value already in the cell and show the new value in the
same cell. e.g the cell B7 has a value of 100 and I add 200 in Tb1 then click
on Add1 cell B7 would then show 300.

Private Sub Add1_Click()

startrownum = 7
endrownum = 25
For rownum = startrownum To endrownum
If Trim(Sheets("Income Expense 2007").Range("A" & Trim(Str(rownum)))) =
"" Then
freerownum = rownum
rownum = endrownum
End If
Next rownum

Sheets("Income Expense 2007").Range("A" & Trim(Str(freerownum))) = Com1.Value
Sheets("Income Expense 2007").Range("B7") = Tb1.Value

End Sub

--
Many thanks

hazel

--

Dave Peterson