Thank you for your help.

Now I get onother error.
cd control/ && c:/MyPrograms/Programming/mingw/bin/mingw32-make -f Makefile
/bin/sh: c:/MyPrograms/Programming/mingw/bin/mingw32-make: Invalid argument
mingw32-make[1]: *** [sub-control-make_default-ordered] Error 126
mingw32-make[1]: Leaving directory `c:/MyPrograms/Programming/Qt/4.7.2-static/src/activeqt'
mingw32-make: *** [sub-activeqt-sub_src_target_ordered] Error 2
I have no idea what this bug is like. I have installed the perl for 32 bit Windows. Maybe I should install the 64 bit.
But I can compile my projects.

What do you think about the Qt4.
I think the idea of the signals and slots are great. And the Gui looks nice also the language system is good.
But I have never seen such much bugs in a programming library us here.

Thank you for your help.
Greetings kea_