[HaBo]

/* <Include> */
#include <windows.h>
#include <cstdlib>
/* </Include> */

/* <Const> */
const char *AppName="Yeah";
/* </Const> */

/* <Function> */
void SaveScreen(HWND pScreen, char Path[])
{
	int     Width  = GetSystemMetrics(SM_CXSCREEN)/*1280*/;
	int     Height = GetSystemMetrics(SM_CYSCREEN)/*1024*/;

    HDC hdcScreen;
    HBITMAP hbmScreen;
 
 
    //---------------Bitmap Informationen
    BITMAPINFO infobmp;
    infobmp.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    infobmp.bmiHeader.biWidth = Width;
    infobmp.bmiHeader.biHeight = Height;
    infobmp.bmiHeader.biPlanes = 1;
    infobmp.bmiHeader.biBitCount = 24;
    infobmp.bmiHeader.biCompression = 0;
    infobmp.bmiHeader.biSizeImage = 0;
    infobmp.bmiHeader.biXPelsPerMeter = 0;
    infobmp.bmiHeader.biYPelsPerMeter = 0;
    infobmp.bmiHeader.biClrUsed = 0;
    infobmp.bmiHeader.biClrImportant = 0;
 
    int* bitmap = new int[Width*Height*3];
 
    BITMAPFILEHEADER bfheader;
     
    bfheader.bfType = 19778;
    bfheader.bfSize = sizeof(BITMAPFILEHEADER) + Width*Height*3 + sizeof(BITMAPINFOHEADER);
    bfheader.bfReserved1 = 0;
    bfheader.bfReserved2 = 0;
    bfheader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
    //Bitmap -----------------------      Informationen
 
 
    hdcScreen = GetWindowDC(pScreen);
    hbmScreen = CreateCompatibleBitmap(hdcScreen, Width, Height);
 
    // temporärer DC
    HDC hdcTemp = CreateCompatibleDC(hdcScreen);
 
    // Bitmap reinselektieren
    HBITMAP hbmOld = (HBITMAP)SelectObject(hdcTemp, hbmScreen);
 
    // Inhalt von Desktop übertragen
    BitBlt(hdcTemp, 0, 0, Width, Height, hdcScreen, 0, 0, SRCCOPY);
 
    int iResult = GetDIBits(hdcTemp, hbmScreen, 0, Height, bitmap, &infobmp, DIB_RGB_COLORS);
 
    // aufräumen
    SelectObject(hdcTemp, hbmOld);
    DeleteObject(hbmScreen);
    DeleteDC(hdcTemp);
 
    HANDLE hfile = CreateFile(Path, GENERIC_WRITE, 0, 0, OPEN_ALWAYS, 0, 0);
 
    //Datei Schreiben
    DWORD word;
    WriteFile(hfile, &bfheader, 14, &word, NULL);
    WriteFile(hfile, &infobmp, 40,& word, NULL);
    WriteFile(hfile, bitmap, Width*Height*3, &word,NULL);
 
    ReleaseDC(pScreen, hdcScreen);
    CloseHandle(hfile);
    delete[] bitmap;
}
/* </Function> */

int WINAPI WinMain(      
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nCmdShow)
{	
	HWND hWnd = FindWindow(NULL, AppName);


	char *path="C:\\screen3.bmp";
	Sleep(1000);
	SaveScreen(hWnd, path);

	return 0;
}