How to resolve event-not response in C + + _c language

In the C + + development process for such reasons, you can click on the menu, right-click the menu does not respond to the problem, or click a menu, but the response is the B menu. When you encounter the above problems, you can analyze from the following aspects, generally can solve the problem. Here are four ways to solve the problem:
1, check the menu ID for the event mapping table exists , if not exist will not respond to
2, check the menu ID and other menu ID is duplicated , if there is duplication may appear confusedly phenomenon (click a menu, but respond to the behavior of the B menu)
3, the menu ID and the corresponding Menu event mapping table ID is consistent , may appear the menu ID and event map ID inconsistent
4. In QT, notice whether the signal function forgets to write parentheses :
Connect (underbtn,signal (clicked ()), This,slot (Slotunder ()));
If the Slotunder function in slot (Slotunder ()) does not write parentheses, there is also an issue that cannot be answered by the event.
For the 4th, MFC, Wxwidgets will also appear similar problems