简单实用的bmp文件显示程序

#include"windows.h" #include<stdio.h> #include<stdlib.h> #include"resource.h" #define size 100 HDC hMemDc; HBITMAP hBmp; BITMAP bmp; HDC hDc; LRESULT CALLBACK WindowProc ( HWND , //handle to window UINT , //message identifier WPARAM ,//first message parameter LPARAM //second message parameter ); int WINAPI WinMain ( HINSTANCE hInstance, //handle to current instance HINSTANCE hPrevInstance, //handle to previous instance LPSTR lpCmdLine, //pointer to command line int nCmdShow //show state of window ) { HWND hwnd; MSG msg; WNDCLASS wndcls; wndcls.cbClsExtra = 0; wndcls.cbWndExtra = 0; wndcls.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndcls.hCursor = LoadCursor(NULL,IDC_ARROW); wndcls.hIcon = LoadIcon(NULL,IDI_APPLICATION); wndcls.hInstance = hInstance; wndcls.lpfnWndProc = WindowProc; wndcls.lpszClassName = "test"; wndcls.lpszMenuName = NULL; wndcls.style = 0; if (NULL==RegisterClass(&wndcls))MessageBox(NULL,"hellow",TEXT("test"),0);; hwnd = CreateWindow("test",TEXT("test bitmap"), WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT, CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL); int i; hBmp = LoadBitmap(hInstance,MAKEINTRESOURCE(mybmp)); GetObject(hBmp,sizeof(BITMAP),(LPVOID)&bmp); ShowWindow(hwnd,nCmdShow); UpdateWindow(hwnd); while (GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WindowProc ( HWND hWnd, //handle to window UINT uMsg, //message identifier WPARAM wParam,//first message parameter LPARAM lParam //second message parameter ) { PAINTSTRUCT ps; switch (uMsg) { case WM_CREATE: hDc = GetDC(hWnd); hMemDc = CreateCompatibleDC(hDc); ReleaseDC(hWnd,hDc); case WM_PAINT: hDc = BeginPaint(hWnd,&ps); SelectObject(hMemDc,hBmp); BitBlt(hDc,250,100,bmp.bmWidth,bmp.bmHeight,hMemDc,0,0,SRCCOPY); EndPaint(hWnd,&ps); break; case WM_DESTROY: DeleteObject(hBmp); PostQuitMessage(0); break; default: return DefWindowProc(hWnd,uMsg,wParam,lParam); }; return 0; }