Kern dynamic text is Flash Actionscript

I've always needed to know how to kern dynamic text is Flash Actionscript, and I knew there had to be a way. Well, here it is. I discovered this somewhere, made some tweeks, good stuff.

function kernText(myTextField, kerning) {
myTextField.html = true;
var newFormat:TextFormat = new TextFormat();
newFormat.letterSpacing = kerning;
//newFormat.font = "Arial"; // Add now whatever format needs you have.
myTextField.setTextFormat(newFormat);
}