private static IntPtr WmNcPaint(IntPtr hwnd, IntPtr wparam, ref bool handled)
{
var hrgnClip = wparam == new IntPtr(1) ? IntPtr.Zero : wparam;
var dcEx = NativeMethods.GetDCEx(hwnd, hrgnClip, 155);
if (dcEx != IntPtr.Zero)
{
try
{
var nonClientFillColor = Colors.Black;
var solidBrush =
NativeMethods.CreateSolidBrush(nonClientFillColor.B << 16 | nonClientFillColor.G << 8 |
nonClientFillColor.R);
try
{
var relativeToWindowRect = GetClientRectRelativeToWindowRect(hwnd);
relativeToWindowRect.Top = relativeToWindowRect.Bottom;
relativeToWindowRect.Bottom = relativeToWindowRect.Top + 1;
NativeMethods.FillRect(dcEx, ref relativeToWindowRect, solidBrush);
}
finally
{
NativeMethods.DeleteObject(solidBrush);
}
}
finally
{
NativeMethods.ReleaseDC(hwnd, dcEx);
}
}
handled = true;
return(IntPtr.Zero);
}