>>>Is there a way (without purchasing any third party software) to create a setup exe that will install an application and register all required dll and ocx files?
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>>See Re: InstallShield help needed Message #1284026, Re: The perfect setup routine Thread #1262704 Message #1262712
>
>I think so you sign to innosetup. Can I add statusbar or treeview control too with innosetup?

See Installing OCX with InnoSetup Thread #1000620