I have a form that is set to the right side of the screen and is borderless, i.e set to 0

I want to resize the form but all the examples I have found only adjust the width from the right side of the form. I need to be able to change the width of the form from the left side. I know if I set the border style to '2' it is sizable and it can be sized from the left or right, but my form needs to remain fixed to the right of the screen.

The form also has a gradient effect and turning on the border looks bad is it does not look the same as the main form.

Only the width needs adjusting as the height is set to the screen height.

If anybody could help it would be most appreciated.