How to know which shape as triggered the userform

I need to determine which shape has been clicked to get the column of this shape.

So I have multiple shapes in a worksheet and they all have the same name... (Automated generation) but they are in different culumns.

Each shape has the same sub associated to his .Onaction which is a simple .show sub

Sub FillItForMe()
FillData.Show
End Sub

Then at Userform_Initialize() I need to know which one has been clicked on.

The problems is:
- They all have the same name so this get the first named as the one clicked on in the shapeS collection

ActiveSheet.Shapes(Application.Caller).TopLeftCell.Column

And the sheet must remains locked... So no selection...

Any ideas?