本例效果图:
本例在窗体建立时, 动态添加了三个菜单; 并赋予它们自我删除的功能.
本例使用的资源文件(TestRes.rc):
本例在窗体建立时, 动态添加了三个菜单; 并赋予它们自我删除的功能.
本例使用的资源文件(TestRes.rc):
MyMenu1 MENUEX BEGIN POPUP "&File" BEGIN MENUITEM "E&xit" ,101 END END本例代码文件:
program Project1; {$R 'TestRes.res' 'TestRes.rc'} uses Windows, Messages; const IDM_1 = 1; {定义三个标识菜单项的常量} IDM_2 = 2; IDM_3 = 3; {收到 WM_CREATE 消息时添加三个菜单项} procedure OnCreate(h: HWND); var hm: HMENU; begin hm := GetMenu(h); {获取窗口主菜单句柄} AppendMenu(hm, MFT_STRING, IDM_1, 'Menu&1'); {添加菜单项} AppendMenu(hm, MFT_STRING, IDM_2, 'Menu&2'); AppendMenu(hm, MFT_STRING, IDM_3, 'Menu&3'); end; {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 101: DestroyWindow(h); {关闭窗口; 101 是在资源文件中给 Exit 菜单指定的标识} IDM_1, IDM_2, IDM_3: begin {点击新建的三个菜单时...} DeleteMenu(GetMenu(h), w, 0); {删除该菜单} DrawMenuBar(h); {重绘菜单} end; end; end; function WndProc(wnd: HWND; msg: UINT; wParam: Integer; lParam: Integer): Integer; stdcall; begin Result := 0; case msg of WM_CREATE : OnCreate(wnd); {收到 WM_CREATE 消息后调用 OnCreate 过程} 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.