Windows 程序设计学习笔记（三）：第一个窗口

这个程序比较特别，以后基本上都以此为模板，所以好好研究研究。

/*------------------------------------------------------------------------ HELLOWIN.C -- Displays "Hello, Windows 98!" in client area (c) Charles Petzold, 1998 -----------------------------------------------------------------------*/#include <windows.h>LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){static TCHAR szAppName[] = TEXT("HelloWin");HWND hwnd ;MSG msg ;WNDCLASS wndclass;wndclass.style = CS_HREDRAW | CS_VREDRAW;wndclass.lpfnWndProc = WndProc;wndclass.cbClsExtra = 0 ;wndclass.cbWndExtra = 0;wndclass.hInstance = hInstance ;wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);wndclass.lpszMenuName = NULL;wndclass.lpszClassName= szAppName;if(!RegisterClass(&wndclass)){MessageBox(NULL,TEXT ("This program requires Windows NT!"),szAppName, MB_ICONERROR);return 0;}hwnd = CreateWindow(szAppName , TEXT ("The Hello Program"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);ShowWindow(hwnd, iCmdShow);UpdateWindow(hwnd);while(GetMessage(&msg, NULL, 0, 0)){TranslateMessage (&msg);DispatchMessage (&msg);}return msg.wParam;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){HDC hdc ;PAINTSTRUCT ps ;RECT rect ;switch (message){case WM_CREATE:PlaySound (TEXT("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;return 0;case WM_PAINT:hdc = BeginPaint(hwnd, &ps);GetClientRect (hwnd, &rect);DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);EndPaint (hwnd, &ps);return 0;case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc (hwnd, message, wParam, lParam) ;}