/// <summary>
/// Disposes the DC, but leaves the bitmap alone.
/// </summary>
private void DisposeDC()
{
if (_oldBitmap != IntPtr.Zero && _compatDC != IntPtr.Zero)
{
SafeNativeMethods.SelectObject(new HandleRef(this, _compatDC), new HandleRef(this, _oldBitmap));
_oldBitmap = IntPtr.Zero;
}
if (_compatDC != IntPtr.Zero)
{
UnsafeNativeMethods.DeleteDC(new HandleRef(this, _compatDC));
_compatDC = IntPtr.Zero;
}
}
private void DisposeDC()
{
if (oldBitmap != IntPtr.Zero && compatDC != IntPtr.Zero)
{
Debug.WriteLineIf(DoubleBuffering.TraceVerbose, "restoring bitmap to DC");
SafeNativeMethods.SelectObject(new HandleRef(this, compatDC), new HandleRef(this, oldBitmap));
oldBitmap = IntPtr.Zero;
}
if (compatDC != IntPtr.Zero)
{
Debug.WriteLineIf(DoubleBuffering.TraceVerbose, "delete compat DC");
UnsafeNativeMethods.DeleteDC(new HandleRef(this, compatDC));
compatDC = IntPtr.Zero;
}
}
