Fortran callable QM functions

[win]

I am using the following code, can't succeed, why?

AHK Format:
SendMessage, Msg , wParam, lParam, Control, WinTitle, WinText, ExcludeTitle, ExcludeText, Timeout

code:
1.
SendMessage, 0xC , 1, "M ''Macro2''", ahk_class QM_Editor, Quick Macros - Main - [Macro2]

2.
MyVar:="M ''Macro2''"
SendMessage, 0xC , 1, &MyVar, ahk_class QM_Editor, Quick Macros - Main - [Macro2]