Omar,
You are missing one important word:

Public Function Sel_Len(Cell_Ref As Range) As Integer

NickHK

"Omer" wrote in message
...
I want to create a custom function in VBA. The Function will take the
parameter as the sum formula in excel. How do I define parameter in VBA.
The
Sum function takes upto 30 arguments but I am interested in only one
augument. I tried the following declarations:
1 Public Sel_Len(Cell_Ref as Range) as Integer
2 Public Sel_Len(Cell_Ref as String) as Integer
I want to get the range cell address so that I can loop it for my
calculation.
Thanks & Regards,