public static extern int DrawThemeBackground(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, ref APIRect rect, ref APIRect clipRect);
public static extern int DrawText(IntPtr hDC, string lpString, int nCount, ref APIRect Rect, int wFormat);
public static extern int DrawFocusRect(IntPtr hDC, ref APIRect rect);
public static extern int InvertRect(IntPtr hDC, ref APIRect rect);
public static extern IntPtr GetWindowRect(IntPtr hWND, ref APIRect Rect);
public static extern int FillRect(IntPtr hDC, ref APIRect rect, IntPtr hBrush);