As refere to the MSDN library, I found that the RegCreateKey is for 16 bit version windows and the RegCreateKeyEx is for Win32 base application.

So My question is, can we use the regCreateKey API in Win32 base application? or I need to use the RegCreateKeyEx API in all my Win32 base application?

From what I can see in the [RegCreateKeyEx[/b] API, it need more arguement as compare to the RegCreateKey API.

Regards,
Chris.C