A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Autoscaling a userform is problematic - it's difficult to predict whether the layout will look good and whether text will remain readable (if you shrink text boxes/labels and keep the font size the same, the text may not fit any more, but if you reduce the font size, it may become too small to read).
The general recommendation is to design forms for the lowest resolution that you want to support. They should then still be useable in higher resolutions.