I need to disable the close window button in a specific case, but I don't know how to do it. Is there a way to do this?

CodePudding user response：

The Outlook extensibility model doesn't provide anything for that out of the box. You may try using Windows API functions to subclass Outlook windows, but this is not really a supported scenario - you do everything on your own risk. See SetWindowsHookEx for more information.