private void CreateImageDc(int width, int height, IntPtr hBmp)
{
IntPtr pHdc = IntPtr.Zero;
pHdc = NativeMethodsToop.CreateDCA("DISPLAY", "", "", 0);
_pHdc = NativeMethodsToop.CreateCompatibleDC(pHdc);
if (hBmp != IntPtr.Zero)
{
_pBmp = hBmp;
}
else
{
_pBmp = NativeMethodsToop.CreateCompatibleBitmap(pHdc, width, height);
}
_pBmpOld = NativeMethodsToop.SelectObject(_pHdc, _pBmp);
if (_pBmpOld == IntPtr.Zero)
{
ImageDestroy();
}
else
{
_width = width;
_height = height;
}
NativeMethodsToop.DeleteDC(pHdc);
pHdc = IntPtr.Zero;
}
private void ImageDestroy()
{
if (_pBmpOld != IntPtr.Zero)
{
NativeMethodsToop.SelectObject(_pHdc, _pBmpOld);
_pBmpOld = IntPtr.Zero;
}
if (_pBmp != IntPtr.Zero)
{
NativeMethodsToop.DeleteObject(_pBmp);
_pBmp = IntPtr.Zero;
}
if (_pHdc != IntPtr.Zero)
{
NativeMethodsToop.DeleteDC(_pHdc);
_pHdc = IntPtr.Zero;
}
}