Scroll question

Hi!
How can I make to possible scrolling with the mouse wheel the embedded flash site? If the mouse is over the flash the mouse wheel doesn't work, but on the sides where flash isn't, the scroll is working. Or is there a command, which control the mouse wheel? For example: if I scroll the wheel on my mouse, a variable change his value. How can I do it? ActionScript2
Thank you for the answers,
WISION

Thank you! The actionscript is working, but only if I click with my mouse into de flash window. How can I solve the mouse scroll without clicking into the falsh?
var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(mousescroll) {
trace(mousescroll);
Mouse.addListener(mouseListener);
Thank you for your answer,
WISION

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