It appears that call returns information about what the display can do based on what it sent the PC during the DDC exchange. I have a case where there are 'non-published' configurations that the display can support. But ChangeDisplaySettings only allows settings that are advertised by the display through the ddc exchange. Jeremy

Thanks -- I should have noticed the access-type. So, it seems that this stunning complicated wmi interface is just to get stuff. So, back to ChangeDisplaySettings. I'll post another question on that!! Jeremy