Flex air project: how to keep the form centered during air running?

I made an air project in flex. Every time you run it, the screen is not centered. How can I keep the form centered during the air operation? Center screen? What method should I use?

Solution:

1.// Obtain the screen resolution.

Private var stageheight: Number = flash. system. capabilities. screenresolutiony; 

Private var stagewidth: Number = flash. system. capabilities. screenresolutionx;

2. Use the move () method to move to the center during window Initialization

This. Move (stagewidth/2-this.width/2, stageheight/2-this.height/2); // (this current form)

 

(Note: Maximize display
Stage. nativewindow. Maximize ();)