public Size GetPartSize(GraphicsContext dc, int partId, int stateId, PartSizingMode mode, Rect rect)
{
AssertPartDefined(partId, stateId);
int hr = NativeMethods.GetThemePartSize(Handle, dc.Handle, partId, stateId, ref rect, mode, out var size);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return(size);
}
public static extern int GetThemePartSize(IntPtr hTheme, IntPtr hDC, int partId, int stateId, [In] ref Rect rect, PartSizingMode sizeMode, out Size size);
