XPDrawWindow
From X-Plane SDK
XPDrawWindow
WIDGET_API void XPDrawWindow( int inX1, int inY1, int inX2, int inY2, XPWindowStyle inStyle);This routine draws a window of the given dimensions at the given offset on the virtual screen in a given style. The window is automatically scaled as appropriate using a bitmap scaling technique (scaling or repeating) as appropriate to the style.