Okay, I have an MFC - Windows Explorer based app and I want to add context menus. I created the Menu resource and added the menu items. I used the class Wizard to add handlers for the menu commands and added a handler for WM_RBUTTONUP to display the context menu. It works, except it only displays the menu if you double click with the right mouse button. If you single click the right mouse button the handler doesn't get called. Any ideas?