c/C++ 【Win32】 创建一个 Button

创建一个 Button

HWND hwndButton

hwndButton = CreateWindow(
"BUTTON",// predefined class 不区分大小写
"OK",// button text
WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,// styles注意 如果样式写错了Button 将不会正常显示

// Size and position values are given explicitly, because
// the CW_USEDEFAULT constant gives zero values for buttons.
10,// starting x position
10,// starting y position
100,// button width
100,// button height
hwnd,// parent window
NULL,// No menu
(HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE),
NULL);// pointer not needed

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#include <windows.h> //expected constructor, destructor, or type conversion before // LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); LRESULT CALLBACK WndProc(HWND hWnd, UINT message,WPARAM wParam, LPARAM lParam); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){ static TCHAR szAppName[] = TEXT("hello"); HWND hwnd; MSG msg; WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; // 加载 图标供程序使用 IDI-图示ID wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); // 加载 鼠标光标供程序使用 IDC-游标ID wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); //GetStockObject 取得一个图形对象(此例中是取得窗口背景的画刷对象) wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; // 窗口依照某一窗口类别建立，窗口类别用以标识处理窗口消息的窗口消息处理程序。 // 注册窗口 if(!RegisterClass(&wndclass)){ MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName,MB_ICONERROR); return 0; } // 根据窗口类别 WndClass 建立一个窗口 hwnd = CreateWindow(szAppName, // window class name TEXT("Hello world"), // window caption WS_OVERLAPPEDWINDOW, // window style CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, // parent window handle NULL, // window menu handle hInstance,//program instance handle NULL); // creation parameters // 在屏幕上显示窗口 ShowWindow(hwnd,iCmdShow); // 指示窗口自我更新 UpdateWindow(hwnd); // 从消息队列中取得消息 while(GetMessage(&msg,NULL,0,0)){ TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HWND hwndButton; HDC hdc ; PAINTSTRUCT ps ; RECT rect ; char* str; switch (message) { case WM_CREATE: //PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ; // 创建一个按钮 hwndButton = CreateWindow( "BUTTON", // predefined class "OK", // button text WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, // styles // Size and position values are given explicitly, because // the CW_USEDEFAULT constant gives zero values for buttons. 10, // starting x position 10, // starting y position 100, // button width 100, // button height hwnd, // parent window NULL, // No menu (HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE), NULL); // pointer not needed //MoveWindow(hwndSmaller, 100,100, 100, 100, TRUE) ; return 0 ; case WM_PAINT: // 绘制窗口 hdc = BeginPaint (hwnd, &ps) ; // 取得窗口显示区域的大小 GetClientRect (hwnd, &rect) ; str = "hello world!!!"; // 显示字符串 // DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect, // DT_SINGLELINE | DT_CENTER | DT_VCENTER) ; // 输出字符串 TextOut(hdc,20,20, str,strlen(str)); EndPaint (hwnd, &ps) ; return 0 ; case WM_DESTROY: // 再消息队列中插入一个[退出程序]消息 PostQuitMessage (0) ; return 0 ; } // 执行内定的消息处理 return DefWindowProc (hwnd, message, wParam, lParam) ; }