[VB6] - resolution by form and not by screen

[Cambalinho]

Not sure what you are asking.
The resolution is related to the screen the form is displayed on the screen.
You can change the size of the form but that has no effect on the screen resolution nor should it.

You really should not try to change the resolution within your program anyway as it could lead to problems on various monitors.

If you are writing a game or such that runs in full screen mode then it may be acceptable to have options within for different screen sizes but in a form based application this should not be the case.

but i you don't understand what i mean, i you the screen for change the screen resolution. but in window mode???
what i can do is resize the form. but my problem is how can i calculate the controls positions and sizes by form size?