I'm new to QT, i wanted to try it in WinXP, SP 1
i think i installed it correctly (configure.exe and mingw32-make finished without any errors -how i installed everything at the end of post).

then i created a simple file like in tutorial 1 in C:\QT\PRO\ to test QT out:

#include <qapplication.h>
#include <qpushbutton.h>
int main( int argc, char **argv ) {
QApplication a( argc, argv );
QPushButton hello( "Hello world!", 0 );
hello.resize( 100, 30 );
a.setMainWidget( &hello );
hello.show();
return a.exec();
}

what i got was error like:
main.cpp: error: class QApplication has no member named 'setMainWidget'.
when i erased the line with setMainWidget program WAS compiled and working corectly.
another problem appeared with program from tutorial 3:

error: qvbox.h no such file or directory.

Looks like not whole QT was installed on my PC, or something with libraries was wrong. Have i installed something not like i should? Here's how i did it:

1. enviromental variables PATH and QMAKESPEC set (added C:QT\4.3.0\bin, win32-g++)
2. before installing i unset the varibles lib and include (set inlude = , set lib=)
3.i used the opensource windows QT 4.3.0 binary and installed (C:\QT\4.3.0\ )
4. downloaded newest MinGW via troltech downloader and installed it (C:\QT\MinGW\ )
5. in command line typed: configure -debug-and-release
compilation finished WITHOUT any errors
6. mingw32-make
took ages but finished without errors
7. i compiled programs from tutorial using
qmake -project
qmake
make

i will appriciate any help i can get here. How can i fix my qt installation?
Today i tried it on the other PC, but i got even more errors while configuring and using mingw32-make on winxp...