# System. Capabilites screenresolutionX

**URL:** <https://forum.kirupa.com/t/system-capabilites-screenresolutionx/282419>\
**Category:** flash\
**Created:** [February 21, 2009, 8:02pm UTC](https://forum.kirupa.com/t/system-capabilites-screenresolutionx/282419 "2009-02-21T20:02:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ventoline](https://avatars.discourse-cdn.com/v4/letter/v/dec6dc/32.png) [@ventoline](https://forum.kirupa.com/u/ventoline)\
**Post date:** [February 21, 2009, 8:02pm UTC](https://forum.kirupa.com/t/system-capabilites-screenresolutionx/282419/1 "2009-02-21T20:02:57Z")

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HI!

I’m all in perplexity,  
I’m working within flash, and I’m just trying to get the size of my screen , apparently simply:

import flash.system.Capabilities;

trace(flash.system.capabilities.screenResolutionY);

\>\> flash doesn’t know “flash”, i’ve tried, not importing the class, uppercase and lowercase, .\*, flash., fl., System.capabilities… what I am doing wrong?