Question

I’m trying to call a function with a variable name that is generated at run time based upon a combo box value. This is straightforward in most languages but I can’t seem to figure it out in Excel VBA, I suspect this is because I don’t really understand how the compiler works. I’ve found several posts that are close but don’t quite seem to do the trick. The code below is wrong but should give an idea of what I want.

Thanks

Sub main()
    'run formatting macros for each institution on format button click

     Dim fn As String
     Dim x As Boolean

     'create format function name from CB value        
     fn = "format_" & CBinst.Value

     'run function that returns bool
     x = Eval(fn)

     ...

End Sub

Answer 1

CallByName is what you’ll need to accomplish the task.

example:
Code in Sheet1

Option Explicit
Public Function Sum(ByVal x As Integer, ByVal y As Integer) As Long
    Sum = x + y
End Function

Code is Module1 (bas module)

Option Explicit

Sub testSum()
Dim methodToCall As String
methodToCall = "Sum"

MsgBox CallByName(Sheet1, methodToCall, VbMethod, 1, 2)
End Sub

Running the method testSum calls the method Sum using the name of the method given in a string variable, passing 2 parameters (1 and 2). The return value of the call to function is returned as output of CallByName.