RE: how to close caller form through++?

Oh I missed the  part that you open a dialog not a form. Instead of opening a dialog you could create an actual form and open and detach it like this:

FormRun formRun;

Args args = new Args();

;

args.name(formstr(YOURFORMNAME));

formRun = ClassFactory.formRunClass(args);

formRun.init();

formRun.run();

formRun.detach();

this.close();