1- Make sure 'frmGridUI' is the name of the form you are trying to resize.
2- If you are trying to resize vertically ONLY, the width will NOT change but the height property will. Where as in your code you are only assigning the width of the form.
3- In the resize event, try putting the code:
Debug.print "Form Height: " & Me.Height
Debug.print "Form Width:" & Me.Width
run the project and try to resize. you will see in the immediate window that the height and width properties do change. {W r i t e C o d e A n d K i c k A s s}