case IDM DELMENU: Delete Menu( hmenu,2, ME BYPOSITION;∥删除统计计算菜单项 ∥相应改变“文件”菜单中有关统计计算菜单项的属性 EnableMenultem(hmenu,IDM_ ADDMENU,MF_ENABLED Enable Menuitem(hmenu, IDM_DELMENU, MF- GRAYED); Draw MenuBar(hwnd) /重新显示窗口菜单 break; case DM EX忙: SendMessage(hwnd, WM_DESTROY,0,0) break: break case WM DEStRoY PostQuitMessage(0) break: default: return DefWindow Proc(hwnd, message, wParam, IParam); return O23 case IDM_DELMENU: DeleteMenu(hmenu,2,MF_BYPOSITION); //删除统计计算菜单项 //相应改变“文件”菜单中有关统计计算菜单项的属性 EnableMenuItem(hmenu,IDM_ADDMENU,MF_ENABLED); EnableMenuItem(hmenu,IDM_DELMENU,MF_GRAYED); DrawMenuBar(hwnd); //重新显示窗口菜单 break; case IDM_EXIT: SendMessage(hwnd,WM_DESTROY,0,0); break; } break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd,message,wParam,lParam); } return 0; }