comboBox on(change)?

Why can't I add an on(change) handler to my comboBox!?!

This is really driving me mad. I place a comboBox on the stage, select it, give it an instance name, then add the following actionscript:

Code:

---

on(change){
  trace("hello");
}

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... but when I try to run it I get the following errors:

Quote:

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Scene=Scene 1, Layer=Layer 14, Frame=1: Line 14: Invalid mouse event specified.
on(change){

Scene=Scene 1, Layer=Layer 14, Frame=1: Line 15: Statement must appear within on/onClipEvent handler
trace("hello");

Scene=Scene 1, Layer=Layer 14, Frame=1: Line 16: Unexpected '}' encountered
}

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What am I doing wrong? This should be so simple...

You can't put on() handlers on components. Use an event listener...

Code:

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function change() {
trace("hello");
}
comboBox.addEventListener("change" , this);

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Technically, "Change" isn't a mouse event. You don't "change" your mouse button, you click it. Under the covers, the combo box's button has a click event, which changes the selectedItem and dispatches a change event.

On the timeline that contains the movieclip, you need to create an event listener for your combobox.

code:

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var listenerObject:Object = new Object();

listenerObject.change = function(eventObject:Object) {

    // Your code here.

};

comboBoxInstance.addEventListener("change", listenerObject)

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