#include <windows.h>
#include <stdio.h>

//Copied from http://www.geocities.com/krishnapg/bitmap.html
void SaveBitmap(char *szFilename,HBITMAP hBitmap)
{
      HDC        hdc=NULL;
      FILE*      fp=NULL;
      LPVOID     pBuf=NULL;
      BITMAPINFO bmpInfo;
      BITMAPFILEHEADER  bmpFileHeader; 
      do{ 
            hdc=GetDC(NULL);
            ZeroMemory(&bmpInfo,sizeof(BITMAPINFO));
            bmpInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
            GetDIBits(hdc,hBitmap,0,0,NULL,&bmpInfo,DIB_RGB_COLORS); 
            if(bmpInfo.bmiHeader.biSizeImage<=0)
				bmpInfo.bmiHeader.biSizeImage=bmpInfo.bmiHeader.biWidth*abs(bmpInfo.bmiHeader.biHeight)*
				(bmpInfo.bmiHeader.biBitCount+7)/8;

            if((pBuf = malloc(bmpInfo.bmiHeader.biSizeImage))==NULL)
            {
                  MessageBox( NULL, "Unable to Allocate Bitmap Memory", "Error", MB_OK|MB_ICONERROR);
                  break;
            }            
            bmpInfo.bmiHeader.biCompression=BI_RGB;
            GetDIBits(hdc,hBitmap,0,bmpInfo.bmiHeader.biHeight,pBuf, &bmpInfo, DIB_RGB_COLORS);       
            if((fp = fopen(szFilename,"wb"))==NULL)
            {
                  MessageBox( NULL, "Unable to Create Bitmap File", "Error", MB_OK|MB_ICONERROR);
                  break;
            } 

            bmpFileHeader.bfReserved1=0;
            bmpFileHeader.bfReserved2=0;
            bmpFileHeader.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+bmpInfo.bmiHeader.biSizeImage;
            bmpFileHeader.bfType='MB';
            bmpFileHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER); 
            fwrite(&bmpFileHeader,sizeof(BITMAPFILEHEADER),1,fp);
            fwrite(&bmpInfo.bmiHeader,sizeof(BITMAPINFOHEADER),1,fp);
            fwrite(pBuf,bmpInfo.bmiHeader.biSizeImage,1,fp); 

      }while(FALSE); 
            if(hdc)     ReleaseDC(NULL,hdc); 
            if(pBuf)    free(pBuf); 
            if(fp)      fclose(fp);
}

int WinMain(HINSTANCE h, HINSTANCE hp, LPSTR c, INT s){
	int i;
	for(i=1; i<=30; i++){
                //Capture the screen
		HDC dc = GetDC(NULL);
		HDC cdc = CreateCompatibleDC(dc);
		HBITMAP screen = CreateCompatibleBitmap(dc, 1280, 1024);
		HBITMAP dummy = SelectObject(cdc, screen);
		BitBlt(cdc, 0, 0, 1280, 1024, dc, 0, 0, SRCCOPY);
		screen = SelectObject(cdc, dummy);

		char TEMPFILE[255];
		sprintf(TEMPFILE, "c:/bmp%i.bmp", i);
		
                //Save the HBITMAP to disk
		SaveBitmap(TEMPFILE, screen);
	
		DeleteObject(screen);
		DeleteDC(cdc);
		ReleaseDC(NULL, dc);
	}
	return 0;
	
}