SEnding data between forms

I have MainWIndow. From that window i create dialog Window with table.

Code:

---

WideSearch* wWideSearch=new WideSearch;
 wWideSearch->setSourceModel (createRecordModel(wWideSearch));
wWideSearch->show();
wWideSearch->raise();
wWideSearch->activateWindow()

---

On double click on table i need close dialog Window and send data from QModelIndex to mainWindow. With closing second form there is no problem,but i don't know how send data back to mainWindow?

Have a look at signals and slots.
http://doc.trolltech.com/4.7/signalsandslots.html