Using "tab" in textfield changes the focus

programming flash
1

Hi, I want to catch press tab event in textfield. I even know the keyCode of tab, but as I press tab in the textfield, the focus jumps on the next mc.
How can I disable changing focus, or how can I reach tab on press event?

Now I have the following code, but It doesn’t catch the tab:


private function keybEventHandler(event:KeyboardEvent) {
			trace(event.keyCode)
			if (event.charCode == 9)
			{
				eventHandler();
			}
}