Christian,
Go back to this part
http://www.levelextreme.com/wconnect/wc.dll?FournierTransformation~2,15,755315 of another thread I've been working on for a bit and see if that code fragment helps you at all.
You'll need to use the right flag for the date time controls, but it may help you get themed correctly.
>We use MS MSComCtl2.DTPicker to let users select a date from a drop down calendar.
>
>With XP themes, this control is not "themed" and always shows the W2K look. We were used to have VFP controls look "old" and ActiveX ones look great, but now VFP is ahead of time! Does anyone have an idea how to make MSComCtl2 controls inherit XP themes?