I have a dictionary application in which Ctrl+C does not work, so the only way to copy is to go from the menu, Edit > Copy. I have tried using the following code and variations of it, but it did not work.
!l::
WinActivate, MAGENTA - Dictionaries Explorer II
WinMenuSelectItem, ahk_class TMainForm,, Edit, Copy
return
WinSpy data:
MAGENTA - Dictionaries Explorer II
ahk_class TMainForm
ahk_exe MgDE2.EXE
ahk_pid 2580

SendMessage, check PostMessage / SendMessage Tutorial - Yane