how to port from qt3 to qt4

[narlapavan]

i used uic3 for converting to qt4 from qt3 but i am unable to change .ui file i.e GUI(forms).
please help me in details steps how to convert from qt3 to qt4

[anda_skoa]

i used uic3 for converting to qt4 from qt3

That doesn't make sense, uic, no matter which version, converts from UI XML to C++ code.
If you target Qt4 you need to make sure the .pro file is processes by qmake of Qt4 so that the most recent UIC is being used.

but i am unable to change .ui file i.e GUI(forms).

You mean Qt4 designer can't open the file?

Cheers,
_