How to use QConfig to reduce the size of my Qt application?

Hi,

I have tried to use QConfig to reduce the size of my Qt application. After having disabled some features in QConfig that I don't need I reconfigured and statically compiled Qt, then I compiled my application with the new custom Qt but the resulting executable had the same size! There is little information available about QConfig, the official Qt documentation (http://doc.qt.nokia.com/4.3/qtopiacore-features.html) is meaningless and I could not find any helpful posts on the internet either.

How do I use QConfig effectively to reduce the size of my Qt application? Are there other approaches to disable unneeded features from Qt?

Thanks for Help!