PAINT_RedrawWindow(3w)

PAINT_RedrawWindow

NAME

PAINT_RedrawWindow - PAINT_RedrawWindow

SYNOPSIS

BOOL32 PAINT_RedrawWindow
(

HWND32 hwnd,

const RECT32 *rectUpdate,

HRGN32 hrgnUpdate,

UINT32 flags,

UINT32 control
);

DESCRIPTION

PAINT_RedrawWindow.

FIXME

Windows uses WM_SYNCPAINT to cut down the number of intertask SendMessage() calls. This is a comment inside DefWindowProc() source from 16-bit SDK:

This message avoids lots of inter-app message traffic by switching to the other task and continuing the recursion there.

WParam = flags LOWORD(lParam) = hrgnClip HIWORD(lParam) = hwndSkip (not used; always NULL)

All in all, a prime candidate for a rewrite.