I have the following Code in a procedure, what I am trying to do is set up a new style on a workbook object in excel.

I know that you can do this like so:
oExcel.oWorkBook.Styles.Add "Bold"
oExcel.oWorkBook.Styles("Bold").Font.Size = 12

But when trying to the same with the following code, I get the following message:
object does not support this property or method.

Any Ideas....

With m_oWorkBook
If llAdd Then
.Styles.Add (strStyle)
End If

lcComm = "Styles(" & Chr(34) & strStyle & Chr(34) & ")." & strProperty
CallByName m_oWorkBook, lcComm, VbLet, vValue
End With

The strStyle, strProperty and vValue are parameters.

Thanks in advance.
Simon.