Adding dimension selection to report

When you create a report that shows dimensions, which code do you need to add to the report to allow the user to select which dimensions are displayed?
This is how the dialog looks like:

Code:

classDeclaration
    DialogGroup         dialogDimGroup;
    InventDimParm       inventDimParm;

initParmDefault
    inventDimParm.initItemDimAllGrp();
    if (InventParameters::find().MultiSiteActivated)
        inventDimParm.InventSiteIdFlag = true;

dialog
    dialog = super(_dialog);
    dialogDimGroup  = inventDimParm.addFieldsToDialog(dialog,"@SYS53654",true, false, "@SYS102592");

getFromDialog
    inventDimParm.getFromDialog(dialog,dialogDimGroup);

run
    InventDimCtrl::updateReportVisible(element, inventDimParm);
    super();