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A user form can be made in the Visual Basic for Application framework (where macro can be edited).

Userforms are containers to hold ActiveX controls (as Spreadsheets are).

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How to call it ?

• when clicking on a button: Create a UserForm named UserForm1, add a button to the worksheet and attach the following code that shows the UserForm.

Private Sub CommandButton1_Click()
   UserForm1.Show
End Sub

• When the workbook open. Add the UserForm1.Show code on the Workbook.Open event