riched20: hWnd validity test in window procedure

Alexandre Julliard julliard at
Tue Jun 27 04:25:20 CDT 2006

Krzysztof Foltman <wdev at> writes:

> ChangeLog:
>  * Added hWnd validity check to work around buggy apps (bug# 4452)
> This patch is based on Phil Krylov's one, with two differences: it
> checks the handle even before trying to call GetWindowLong, and it
> checks for invalid window handle, not just NULL.

The right way is to check for GetWindowLong failure, there's no reason
to use IsWindow.

Alexandre Julliard
julliard at

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