Description of the problem
In the main window (main.aspx) contains a user control (UserControl.ascx)
There is a text box (TextBox1) and a button (Button1) in this user control, pops up the window (Subform.aspx)
This window has a text box (TextBox2) and a return button (Button2) Click this button after I want to return the contents of TextBox2 to the problem in TextBox1:
