1. The help file said that twip is independent on the screen while pixel is dependent. I did a test: change the screen resolusion for the same application. For a full screen form width, both the twips and pixels were changed (both are dependet to scree?) although the rate of twips to pixel was remained to 15.
2. If we set a form's width = 9600 twips, in different computers it will remain 9600 twips and 640 pixels...I must misunderstood something!