Ui interface and its connected implementation

[Yayati.Ekbote]

Hi!!

I am having a serious problem with QT designing. When i draw widgets on the form in say xyz.ui file. these widgets don't get connected to the code i write in xyz.h file and xyz.cpp file.

The widgets which are drawn on the form have no use. When in implementation file i initialise QPushButton *button = new QPushButton(tr("New"));
a new button appears on the form with the old button drawns on the xyz.ui file in the back. Why does this happen? Do i have to link the individual button interface to its code in implementation file explicitly? If yes then how? if no then what to do??
Plz guide!!