Transfer ActiveX objects and codes onto userform

Hi all,

Here I have a Gantt chart scheduler which is mainly controlled with ActiveX objects (listboxes, buttons, etc.). It is fully functional, but... I want all of those objects to be on a userform,what is easy and I have already drawn it to replicate all controls. But I really have no idea and knowledge make it function on a userform. Could anyone please help me adapting the vba codes from ActiveX to work on userform?

A million thanks!
See attached...