Hi Charlie,

I don't know whether you can set the onaction property to call a macro
in another document directly (it didn't work for me) but what does
seem possible is to set it to call a macro in the template that houses
the toolbar and have that macro call a macro in the other document.

E.g. somewhere in my toolbar template I have some code like this:

Sub RunThis()

  Application.Run MacroName:="MyOtherDocProj.Module1.Test1"

End Sub

I set my control's onaction property to run that sub by executing
something like:

CommandBars("Custom 1").Controls(1).OnAction = "RunThis"

And then my toolbar button can (indirectly) run the macro in the other
doc.

Don't know if this helps.

Cheers.

Ed