extendscript how to execute code that is in edittext

i have a button ready onclick event now how do i execute so it runs codes of the edit textbox.

 var testcodee = winObj.add("button", [759, 570, 759+98, 570+23], "Test Execute code");

testcodee.onClick = function(){

need to execute code here to edit textbox

}

This is the code in

function setFx(lyr)
{
	var eg = lyr.property("ADBE Effect Parade");
	//---------
	var fx = eg.addProperty("ADBE AutoContrast");
	fx.name = "Auto Contrast"
	fx.enabled = true;
	fx.property("ADBE AutoContrast-0001").setValue(0);//Temporal Smoothing (seconds)

	fx.property("ADBE AutoContrast-0002").setValue(0);//Scene Detect

	fx.property("ADBE AutoContrast-0003").setValue(0.10000000149012);//Black Clip

	fx.property("ADBE AutoContrast-0004").setValue(0.10000000149012);//White Clip

	fx.property("ADBE AutoContrast-0005").setValue(0);//Blend With Original

}
if ( app.project.activeItem instanceof CompItem) {
	var sl = app.project.activeItem.selectedLayers;
	if ( sl.length>0){
		setFx(sl[0]);
	}
}