Call a function at a dialog execution

[Nesbit]

I'm writing an application in which I need to open a dialog and execute automatically (without clicking on a push button for example) some animation function.

For opening the dialog, the main windows has a push button that is connected to a slot, which contains

//Open the dialog
dialog dlg=new Dlg ;
dlg.exec();
//Get data from the dialog after it is closed
...

//Open the dialog
dialog dlg=new Dlg ;
dlg.exec();
//Get data from the dialog after it is closed
...

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My dialog class is something like the following, where functionToBeCalled() is the function to be called:

class Dlg : public QDialog
{
     /* ...other attributes and methods here... */
 
public:
    void functionToBeCalled();
}

class Dlg : public QDialog
{
     /* ...other attributes and methods here... */

public:
    void functionToBeCalled();
}

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Could anybody tell me how to do that please?

Thank you in advance for your help.