udfAskYesNo
int udfAskYesNo (str, str)
;------------------------------------------------------------------------------------------------------------------------------------------
#DefineFunction udfAskYesNo (strAYN_Title, strAYN_Question)
Return AskYesNo (strAYN_Title, strAYN_Question)
:CANCEL
Return -1 ; Return integer -1 if Dialog has been cancelled resp. closed by escape key.
#EndFunction
;------------------------------------------------------------------------------------------------------------------------------------------

strAYN_Title    = "" ; Title of the question box.
strAYN_Question = "" ; Question to be put to the user.
intAYN_Result   = udfAskYesNo (strAYN_Title, strAYN_Question) ; Returns @YES, @NO, -1 depending on the button pressed.


And here is a non escapable version. 

;------------------------------------------------------------------------------------------------------------------------------------------
#DefineFunction udfAskYesNo (strAYN_Title, strAYN_Question)
:CANCEL
Return AskYesNo (strAYN_Title, strAYN_Question)
#EndFunction
;------------------------------------------------------------------------------------------------------------------------------------------
strAYN_Title    = "" ; Title of the question box.
strAYN_Question = "" ; Question to be put to the user.
intAYN_Result   = udfAskYesNo (strAYN_Title, strAYN_Question) ; Returns @YES, @NO.
Exit