Again I don't quite follow, is both "CommandButton" & z & "_Click" and the
CallByName code located in Class1. If so the code you posted should work,
assuming a Public procedure named
"CommandButton" & z & "_Click"
exists in the class

If you are trying to call ButtonGroup_Click, why not simply
Me.ButtonGroup_Click
or
cls.ButtonGroup_Click

See "CallByName" in help.

Regards,
Peter T

"Carim" wrote in message
...
Peter,

Again you are right ... there is only one procedure
named Public Sub ButtonGroup_Click()
located in the class ( Class1 )
and the last instruction :
CallByName Me, "CommandButton" & z & "_Click", VbMethod
triggers a run-time error 438 ...
...
Thanks again for your help
Carim