[SOLVED] Error LNK2019

brunosc

Hi guys!

I am beginner with QT/C++.

And need to connect to a database (SQL Server) and created a simple program to test the connection.

But returned me some errors

SGaist

Hi and welcome to devnet,

Did you re-run qmake after adding

@QT += sql@

to your pro file ?

brunosc

That's worked, thanks SGaist.

But why do I need to run qmake?

Whenever I create a new class necessary to run qmake?

Thx again.

SGaist

Because you added a new module to use with your application

Not when adding new classes. However you will have to if you add/remove the Q_OBJECT macro in your QObject derived classes.