Adding Controls at Run Time VB
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vbcode/html/vbtskcodeexampleaddingcontrolsatruntime.aspC#
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cscon/html/vctskCodeAddingControlsAtRunTimeVisualC.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vbcode/html/vbtskcodeexampleaddingcontrolsatruntime.aspC#
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cscon/html/vctskCodeAddingControlsAtRunTimeVisualC.asp
Button btn = new Button();
btn.Text = "new button";
// 直接添加到Form里面
this.Page.Controls[1].Controls.Add(btn);
}