Due to certain specifics of the Property Builder architecture, exposing the columns' declarations globally is not a trivial task and it would require major changes in the design-time tool. Therefore, I am not able to preovide any specific time frame in which such a change would be made.
In this situation, I can only suggest associating the design-time created columns with globally declared variables only once and then use these variables later whenever needed:
Form1 : Form
firstNameCol = (GridViewTextBoxColumn)
lastNameCol = (GridViewTextBoxColumn)
addressCol = (GridViewTextBoxColumn)
Let me know if you have additional questions or suggestions.
the Telerik team