Win7 (or newer Nvidia drivers) don't allow ps_3_0 fragment processing without
vertex shaders. This is interesting on its own, but not part of this test.

COMDLG32_FR_CheckPartial is called with the second parameter of TRUE to
indicate that it is checking for a replace dialog, which includes checking
for a non-NULL replace buffer. This was called correctly on ReplaceTextA
but not for ReplaceTextW.