protected override void OnPaint(PaintEventArgs e)
{
var graphics = e.Graphics;
IntPtr hdc;
if (m_CachedBitmapPtr == IntPtr.Zero)
{
hdc = graphics.GetHdc();
unsafe {
m_CachedBitmapPtr = (IntPtr)BitmapUtility.CreateCachedBitmapPtr((void *)m_BitmapPtr, (void *)hdc);
}
graphics.ReleaseHdc(hdc);
}
hdc = graphics.GetHdc();
unsafe {
BitmapUtility.DrawCachedBitmap((void *)hdc, (void *)m_CachedBitmapPtr, 0, 0);
}
graphics.ReleaseHdc(hdc);
}