CalcVisBehind

Calculate visRgn of a window and all behind it

#include <Windows.h> Window Manager

void CalcVisBehind(theWindow , badRgn );

WindowPeek theWindow ; first window to calculate

RgnHandle badRgn ; region for clipping

This low-level function is used by the Window Manager to calculate the

visible region of a window and all windows behind it.

theWindow is a WindowPeek (pointer to a WindowRecord) of the window to

calculate. The visRgn field of this structure is modified by this

function.

badRgn defines a region that has been adversely affected by some previous

operation. This function affects only those windows that intersect

with this region.

Notes: This should be called after calling PaintBehind.

Referenced by (6):