# Building a mask at runtime

**URL:** <https://forum.kirupa.com/t/building-a-mask-at-runtime/285375>\
**Category:** flash\
**Created:** [March 31, 2009, 3:50am UTC](https://forum.kirupa.com/t/building-a-mask-at-runtime/285375 "2009-03-31T03:50:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Foniks](https://avatars.discourse-cdn.com/v4/letter/f/dfb087/32.png) [@Foniks](https://forum.kirupa.com/u/Foniks)\
**Post date:** [March 31, 2009, 3:50am UTC](https://forum.kirupa.com/t/building-a-mask-at-runtime/285375/1 "2009-03-31T03:50:47Z")

</div>

Hi all,

Just wondering if anyone knows of a method to build a mask at runtime. The mask may not be entirely dynamic (i.e. there may be an existing movieclip that the new components will be merged with).

Cheers!

F