Amend column size on NominalGridLookup

SOLVED

Hi all,

I want to amend the grid inside a dropdown programmatically so the Name column is wide as soon at the form open.

But I am unable to get the grid inside it because its control is PopupTextBox+Dropdown which I cannot initiate in the code. Also the Dropdown class inside PopupTextBox is an internal class. 

Is there any way to do this?