Can I add dynamic properties to Movieclip in library?

johnlouis May 1, 2008, 4:00am 1

Can I add dynamic properties to movieclips i attached from the library?
like:
my_mc.customProperty:Number = 100;
my_mc.customProperty += 10;

i tried doing it that way, i got an error, but maybe i’m just doing it wrong.

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