Today don't know what the problem, the code comments or report the same mistakes, for help,...

CodePudding user response:

Looks like a NULL pointer, examine your () function returns a pointer to the valid?

CodePudding user response:

The

reference 1/f, 7-eleven's reply:

appears to be a NULL pointer, check your () function returns a pointer to the valid?

Thank you, solve the problem, the reason is I used the getmenu () the function, but does not contain any menu window properties, just I add a menu with respect to ok, thank you??