Flash: What is the lock fill

Hi,

I am new to flash, trying to do some animation character. I have 2 queries

  1. What is lock fill; whenever I am trying to fill a color, it shows lock fill…

  2. If I am creating a non regular figure like say with pencil, if I draw some part of it & do other part by later; these will be assumed different objects & I am not able to fill the whole figure with a selected color.

Kindly guide me on this.

Regards