Thanks, that appears like it will work:

PROCEDURE CLICK
      this.AddObject("cn","container")
	this.cn.height = this.Parent.Height-30
	this.cn.width = this.Parent.width -10
	this.cn.anchor = 240
	this.cn.visible = .T.
   ENDPROC

>Try to set control's Anchor to 0 and back after you add control.
>