Comments

In the sample above, in the code section:
// Calculate position of TitleWindow in Application's coordinates.
point1.x=myButton.x;
point1.y=myButton.y;
point1=myButton.localToGlobal(point1);
login.x=point1.x+25;
login.y=point1.y+25;

There is no need to get the x and y of myButton, in fact doing this adds its position within it's container to your offset. The sample code is actualy off setting the window 35x35 from myButton not 25x25


To acurately offset your window 25x25 from your button's location do this:
point1.x=0;
point1.y=0;
point1=myButton.localToGlobal(point1);
login.x=point1.x+25;
login.y=point1.y+25;

Or simply:

var p:Point = myButton.localToGlobal(new Point(0,0));
login.x = p.x+25;
login.y = p.y+25;

This is a custom TitleWindow Class that I use as a login window complimenting a custom application class I posted on another doc page (http://livedocs.adobe.com/flex/201/langref/mx/core/Application.html)

package singularity.security
{
import mx.containers.TitleWindow;
import mx.controls.TextArea;
import mx.managers.PopUpManager;
import mx.controls.TextInput;
import mx.controls.Button;
import flash.events.MouseEvent;
import flash.events.KeyboardEvent;
import mx.containers.Form;
import mx.containers.FormItem;
import mx.controls.Label;

public class LoginPopUp extends TitleWindow
{
[Bindable] public var authUrl:String;
[Bindable] private var logUN:TextInput;
[Bindable] private var logPW:TextInput;
[Bindable] private var statLabel:Label;
private var logForm:Form;
private var uItem:FormItem;
private var pItem:FormItem;
private var bItem:FormItem;
private var logBut:Button;

public function LoginPopUp()
{
super();
super.styleName="LoginPopUp";
super.layout='vertical';
super.autoLayout=true;
super.width=300;
super.height=175;
super.horizontalScrollPolicy='off';
super.verticalScrollPolicy='off';
logUN = new TextInput();
logPW = new TextInput();
logBut = new Button();
authUrl = new String();
logForm = new Form();
uItem = new FormItem();
pItem = new FormItem();
bItem = new FormItem();
statLabel = new Label();
logBut.addEventListener(MouseEvent.CLICK,authenticate);
addEventListener(AuthenticationEvent.ACCESS_ATTEMPT,function(e:AuthenticationEvent):void{ if(e.authenticated) statLabel.text="Access Granted"; else statLabel.text="Login Incorrect"; });
}

override protected function createChildren():void{
super.createChildren();
logForm.defaultButton=logBut;
logForm.percentWidth=100;
logForm.autoLayout=true;
logForm.setStyle('verticalGap',10);
pItem.defaultButton=logBut;
uItem.defaultButton=logBut;
logPW.displayAsPassword=true;
logBut.label="Login";
logBut.useHandCursor=true;
logBut.buttonMode=true;
uItem.addChild(logUN);
pItem.addChild(logPW);
bItem.addChild(logBut);
logForm.addChild(uItem);
logForm.addChild(pItem);
logForm.addChild(bItem);
pItem.label="Password: ";
uItem.label="Username: ";
addChild(logForm);
statLabel.percentWidth=100;
statLabel.height=25;
statLabel.setStyle('color',0xFF0000);
statLabel.setStyle('fontWeight','bold');
addChild(statLabel);
}

private function authenticate(e:Event=null):void {
trace("AuthCheck");
if((String(logUN.text).length<1)&&(String(logPW.text).length<1)){
statLabel.text=String("Enter Login Info");
}

else if(String(logUN.text).length<1){
statLabel.text=String("Enter Username");
}

else if(String(logPW.text).length<1){
statLabel.text=String("Enter Password");
}

else{
statLabel.text="Attempting Authentication";
dispatchEvent(new AuthenticationEvent(AuthenticationEvent.CREDENTIALS_SUBMITTED,logUN.text,logPW.text,"false"));
}

}


}
}