Hi, I am trying to build my own profile switcher using great PowerPro application, http://powerpro.webeddie.com/ . So far I know that I need to change following registry keys, but I don't know how to tell drivers use those settings unless I press ok in Colors tab of ATI's control panel. Is there a dll call or a SendMessage command or a command line application I could use to make drivers use those registry settings after I import them? [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\{Some-Number}\0000] "DALDriverGammaData_Index0FS3DRed" "DALDriverGammaData_Index0FS3DGreen" "DALDriverGammaData_Index0FS3DBlue" [HKEY_LOCAL_MACHINE\SOFTWARE\ATI Technologies\Desktop\{Some-Number}\Profiles\UIO\Color\0] "CurrentProfileFullscreen"