Getting value in VBscript from VBA Excel Macro Function

Question

Fairly new to VBscript and VBA... hoping for some help and that it's an easy answer...

I'm calling a Macro / Function in Excel VBA from VBscript. The call to the Function should return a number. Using VBA debug in Excel, the function appears to work properly (in this example, it displays a value of 1), but when I call the Macro / Function and attempt to echo the value in VBscript it shows as "Empty".

How can I get the value from VBA back to VBscript?
Thanks for your help

Example of VBscript code:

Set excelOBJ = CreateObject("Excel.Application")
Set workbookOBJ = excelOBJ.Workbooks.Open("C:\variable.xlsm")

excelOBJ.Application.Visible = True
excelOBJ.DisplayAlerts = False

REM mostly for testing purposes
    Dim returnValue
    returnValue = 10

    Wscript.Echo "'returnValue' value before call to macro function = " & returnValue
    Wscript.Echo "'returnValue' TypeName before call to macro function = " & TypeName(returnValue)

returnValue = excelOBJ.Run("ThisWorkbook.getNum")

    Wscript.Echo "'returnValue' value after call to macro function = " & returnValue
    Wscript.Echo "'returnValue' TypeName after call to macro function = " & TypeName(returnValue)

excelOBJ.quit

Example of VBA in Excel:

Public Function getNum()
    getNum = 1
    Debug.Print "getNum value = " & getNum
End Function

Output:

'returnValue' value before call to macro function = 10
'returnValue' TypeName before call to macro function = Integer

REM Inside Excel VBA editor
    getNum value = 1

'returnValue' value after call to macro function = 
'returnValue' TypeName after call to macro function = Empty

Answer 1

I'd recommend moving your code to a module if not there already.

This code should be changed

returnValue = excelOBJ.Run("ThisWorkbook.getNum")

If code is in a worksheet, this might work assuming your Worksheet is "Sheet1"

returnValue = excelOBJ.Run("Sheet1.getNum")

Otherwise if it's in a Module, simply use module name

returnValue = excelOBJ.Run("Module1.getNum")

If it starts running with this change but you're not getting anything returned you can change your function to pass return value parameter ByRef and check it that way