takeashot.cpp

 // takeashot.cpp : Defines the entry point for the console application.

//

#include

<stdio.h>

#include

<windows.h>

#include

<malloc.h>

#include

<tchar.h>

void

SaveBitmap(char *szFilename,HBITMAP hBitmap)

{

HDC hdc=NULL;

FILE* fp=NULL;

LPVOID pBuf=NULL;

BITMAPINFO bmpInfo;

BITMAPFILEHEADER bmpFileHeader;

hdc=GetDC(NULL);

ZeroMemory(&bmpInfo,

sizeof(BITMAPINFO));

bmpInfo.bmiHeader.biSize=

sizeof(BITMAPINFOHEADER);

GetDIBits(hdc,hBitmap,0,0,NULL,&bmpInfo,DIB_RGB_COLORS);

pBuf=malloc(bmpInfo.bmiHeader.biSizeImage);

bmpInfo.bmiHeader.biCompression=BI_RGB;

GetDIBits(hdc,hBitmap,0,bmpInfo.bmiHeader.biHeight,pBuf,&bmpInfo,DIB_RGB_COLORS);

fp=fopen(szFilename,

"wb");

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);

free(pBuf);

}

int

_tmain(int argc, _TCHAR* argv[])

{

int nScreenWidth = GetSystemMetrics(SM_CXSCREEN);

int nScreenHeight = GetSystemMetrics(SM_CYSCREEN);

HWND hDesktopWnd = GetDesktopWindow();

HDC hDesktopDC = GetDC(hDesktopWnd);

HDC hCaptureDC = CreateCompatibleDC(hDesktopDC);

HBITMAP hCaptureBitmap =CreateCompatibleBitmap(hDesktopDC,

nScreenWidth, nScreenHeight);

SelectObject(hCaptureDC,hCaptureBitmap);

BitBlt(hCaptureDC,0,0,nScreenWidth,nScreenHeight,

hDesktopDC,0,0,SRCCOPY|CAPTUREBLT);

SaveBitmap(

"myshot.bmp",hCaptureBitmap);

system(

"pause");

return 0;

}