Time line controller


sorry if it’s a simple/stupid question but i haven’t played with flash for over 2 years and i feel lost now.

I am trying to make a simple time line controller. i am trying to achieve the following:
have a graphical control in the shape of one line with a knob that you can slide from left to right and vice versa to make the movie go forward or backwards.
so the width of the slider would be equal to the length of the movie.

a bit like the media controller of flash cs3 but to control the actual swf it’s in or an external swf loaded if that would be easier.

i did a few search but could not find anything. Maybe i forgot the flash “lingo” and searching with the wrong keyword.

thanks in advance for your help