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// Takes a snapshot of the screen and saves it to the disk #include <windows.h> // by: Wolf Coder #include <windows.h> RGBQUAD tempimg[1024*768]; RGBTRIPLE outimg[1024*768]; int WINAPI WinMain(HINSTANCE hinstance,HINSTANCE hprevinstance,PSTR szcmdline,int icmdshow) { HDC hdc,xdc,mdc; HWND hwnd; HBITMAP hbitmap; // For frame locking HPEN hpen = CreatePen(PS_SOLID,0,RGB(0,0,0)); HBRUSH hbrush = (HBRUSH)GetStockObject(BLACK_BRUSH); if(LockWindowUpdate(hwnd = GetDesktopWindow())) { hdc = GetDCEx(hwnd,NULL,DCX_CACHE | DCX_LOCKWINDOWUPDATE); xdc = CreateCompatibleDC(hdc); mdc = CreateCompatibleDC(hdc); // Flashshot the screen hbitmap = CreateCompatibleBitmap(hdc,1024,768); SelectObject(xdc,hbitmap); BitBlt(xdc,0,0,1024,768,hdc,0,0,SRCCOPY); // Open a channel to bitmap DWORD written; HANDLE hfile = CreateFile("snapshot.bmp",GENERIC_WRITE,0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL); // Fill out a bitmap header form BITMAPFILEHEADER bfh; bfh.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER); bfh.bfReserved1 = 0; bfh.bfReserved2 = 0; bfh.bfSize = sizeof(BITMAPFILEHEADER); bfh.bfType = 0x4d42; WriteFile(hfile,&bfh,sizeof(bfh),&written,NULL); // Fill out an info form BITMAPINFOHEADER bih; bih.biBitCount = 24; bih.biClrImportant = 0; bih.biClrUsed = 0; bih.biCompression = BI_RGB; bih.biHeight = 768; bih.biPlanes = 1; bih.biSize = sizeof(bih); bih.biSizeImage = 3*1024*768; bih.biWidth = 1024; bih.biXPelsPerMeter = 2400; bih.biYPelsPerMeter = 2400; WriteFile(hfile,&bih,sizeof(bih),&written,NULL); // Copy the bits to a buffer GetBitmapBits(hbitmap,1024*768*4,&tempimg); // Write the bits to a second buffer for(int y = 0;y < 768;y++) { for(int x = 0;x < 1024;x++) { int index = ((767-y)*1024)+x; int from_index = x+y*1024; outimg[index].rgbtBlue = tempimg[from_index].rgbBlue; outimg[index].rgbtGreen = tempimg[from_index].rgbGreen; outimg[index].rgbtRed = tempimg[from_index].rgbRed; } } // Write to file WriteFile(hfile,&outimg[0],1024*768*3,&written,NULL); // File is done CloseHandle(hfile); // Now pack everything away DeleteObject(hbitmap); ReleaseDC(hwnd,hdc); DeleteDC(hdc); DeleteDC(xdc); DeleteDC(mdc); LockWindowUpdate(hwnd); } DeleteObject(hpen); DeleteObject(hbrush); MessageBox(hwnd,"SCREENSHOT TAKEN","complete",MB_OK); return 1; }
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