Load Excel and create dropdown with same UI form

I am creating a simple script to copy parameters from excel to elements,
Now I have two forms one for picking the file and other for choosing parameter values,where the parameter values are derived from excel file
Is there a way I can combine it in the same winform and make the parameter values refresh while I change the excel file.

Something like process 1 and wait for 2 &3 to refresh while the winforms is open and allows to select new values in 2&3

I don’t think that’s possible with Data-Shapes.

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