Windows 编程[18] - 更换菜单项: ModifyMenu
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Windows 编程[18] - 更换菜单项: ModifyMenu
本例效果图:![o_84228.gif](https://www.cnblogs.com/images/cnblogs_com/del/129733/o_84228.gif)
本例使用的资源文件(TestRes.rc):
MyMenu1 MENUEX BEGIN MENUITEM "Open" ,101 MENUITEM "Old" ,102 MENUITEM "Help" ,103 END本例代码文件:
program Project1; {$R 'TestRes.res' 'TestRes.rc'} uses Windows, Messages; const IDM_New = 202; {常量将作为修改后的菜单的标识} {收到 WM_COMMAND 消息时需要做的工作} procedure OnCommand(h: HWND; wParam: Integer); var w: Word; begin w := LoWord(wParam); case w of 102: begin {102 是在资源文件中指定的菜单标识} ModifyMenu(GetMenu(h), w, 0, IDM_New, 'New!'); DrawMenuBar(h); end; IDM_New: MessageBox(h, '我是新来的', '', 0); end; end; function WndProc(wnd: HWND; msg: UINT; wParam: Integer; lParam: Integer): Integer; stdcall; begin Result := 0; case msg of WM_COMMAND : OnCommand(wnd, wParam); {收到 WM_COMMAND 消息后调用 OnCommand 过程} WM_DESTROY : PostQuitMessage(0); else Result := DefWindowProc(wnd, msg, wParam, lParam); end; end; function RegMyWndClass: Boolean; var cls: TWndClass; begin cls.style := CS_HREDRAW or CS_VREDRAW; cls.lpfnWndProc := @WndProc; cls.cbClsExtra := 0; cls.cbWndExtra := 0; cls.hInstance := HInstance; cls.hIcon := 0; cls.hCursor := LoadCursor(0, IDC_ARROW); cls.hbrBackground := HBRUSH(COLOR_WINDOW + 1); cls.lpszMenuName := 'MyMenu1'; cls.lpszClassName := 'MyWnd'; Result := RegisterClass(cls) <> 0; end; {程序入口} const tit = 'New Form'; ws = WS_OVERLAPPEDWINDOW; x = 100; y = 100; w = 300; h = 180; var hWnd: THandle; Msg : TMsg; begin RegMyWndClass; hWnd := CreateWindow('MyWnd', tit, ws, x, y, w, h, 0, 0, HInstance, nil); ShowWindow(hWnd, SW_SHOWNORMAL); UpdateWindow(hWnd); while(GetMessage(Msg, 0, 0, 0)) do begin TranslateMessage(Msg); DispatchMessage(Msg); end; end.posted on 2008-04-22 23:24 万一 阅读(2792) 评论(2) 编辑 收藏
标签:wParam,begin,end,Windows,18,WM,ModifyMenu,New,cls 来源: https://blog.51cto.com/u_14617575/2746305