Screen Res or aspect ratio problem

[TomPhillips]

I develope on a Del laptop with the screen set at 1400x1050, 120 DPI. My users, typicaly are on CRTs set at 1024x768,96 DPI. My problem is that even if I set my LCD screen to 1024x768 and 96 DPI (which it complains about) to size and position my windows and controls, what I see is not what they get on their CRTs. Controls out of place, etc. Also, my boss has an older laptop with max res at 1024x768 and my windows look bad on his LCD screen too.

Is there any way to find out what the difference is, and how to comensate in my form sizing?