# Background Resize 100% (mask.\_width Problems)

**URL:** https://forum.kirupa.com/t/background-resize-100-mask--width-problems/249812
**Category:** flash
**Created:** [January 22, 2008, 7:04pm UTC](https://forum.kirupa.com/t/background-resize-100-mask--width-problems/249812 "2008-01-22T19:04:53Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![suicidebilly](https://avatars.discourse-cdn.com/v4/letter/s/898d66/32.png) [@suicidebilly](https://forum.kirupa.com/u/suicidebilly)
#### Post date: [January 22, 2008, 7:04pm UTC](https://forum.kirupa.com/t/background-resize-100-mask--width-problems/249812/1 "2008-01-22T19:04:53Z")

</div>

Hey There!

I´ve done a background that checks Stage.width and mc.\_width and then make a 100% Background MovieClip, it works ok, it´s attached here as “resize.fla”.

My problem is to make this background 100% using a Mask inside the Background.MovieClip, anything put inside the movie affect the .\_width and bug all the code, showing the background with the mask .\_width.

What i want to do is to show only the background and everything “inside” the mask layer, i´ve tried everything, search foruns, help files and can´t got this to work.

I´ve tried to make a diference between the widths, something like.::

difX = bg.\_width - mask.\_width;  
difY = bg.\_height - mask.\_height;

and then on resize use

bg.\_width = bg.\_width - difX;  
bg.\_height = bg.\_height - difY;

But no Sucess, the mask is inside the Background MC, and even outside the code does not work.

I´m sending the files here, if anyone could help me i´ll be very thankfull, this thing is really taking out my nights,

resize.fla works Ok (No Mask Inside) and  
resize\_maks.fla has the “bug”.

(The Attached FLAs have a single color background because the file limit accepted here.)

Thanks for any help.