At that point, once you've started coding your actual application, if you run into any snags that you can't figure out with a little bit of research, you can always ask here for advice (providing samples of your code in the area(s) you're stuck in) and maybe we'll be able to better assist you at that stage.
For Each ctrl As Control In Me.Controls("pnlMainPanel").Controls
If ctrl.GetType Is GetType(System.Windows.Forms.Panel) Then
For Each subCtrl As Control In ctrl.Controls
If subCtrl.GetType Is GetType(System.Windows.Forms.TextBox) Then
If subCtrl.GetType Is ...