FP.Origin is the property you're looking for. Note that (0,0) may not be where you think it is, but if you have a control that you always want to be in the upper-left corner, just set the Origin to the X and Y position of that control.
Another thing you can do is line up your front panel exactly the way you want it (window size and scroll position), then make a trivial change such as moving a control one pixel to the right and then back again. When you save the VI, it will remember this position (normally, LabVIEW doesn't consider scrolling a front panel to be a change that requires saving).