菜单消息

以下消息与菜单一起使用。

WM_COMMAND
WM_CONTEXTMENU
WM_DRAWITEM
WM_ENTERMENULOOP
WM_EXITMENULOOP
WM_INITMENU
WM_INITMENUPOPUP
WM_MEASUREITEM
WM_MENUCHAR
WM_MENUSELECT
WM_SYSCOMMAND