http://bugs.winehq.org/show_bug.cgi?id=6745
--- Comment #9 from Roderick Colenbrander thunderbird2k@gmx.net 2008-02-11 02:37:48 --- Wine has a opengl32 test (in dlls/src/opengl32). This test just needs to be extended with a test for wglDeleteContext. It should test whether wglDeleteContext(NULL) is legal.