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It is legal to call UnregisterClass with an hInstance of zero.

This commit is contained in:
Bill Medland 2001-11-20 18:53:16 +00:00 committed by Alexandre Julliard
parent 5c84fff413
commit 0ca07c972d
1 changed files with 1 additions and 1 deletions
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2
windows/class.c
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@ -409,7 +409,7 @@ static BOOL CLASS_UnregisterClass( ATOM atom, HINSTANCE hInstance )
USER_Lock(); USER_Lock();
if (atom && if (atom &&
(classPtr = CLASS_FindClassByAtom( atom, hInstance )) && (classPtr = CLASS_FindClassByAtom( atom, hInstance )) &&
(classPtr->hInstance == hInstance)) (!hInstance || classPtr->hInstance == hInstance))
{ {
ret = CLASS_FreeClass( classPtr ); ret = CLASS_FreeClass( classPtr );
} }