its not to download from any where. REGSVR32 file is locataed at your windows drive (like c:\windows\system32\REGSVR32.exe) just you have to double click on dll file or right click and open with then select file from c:\windows\system32\REGSVR32.exe
after confirmation, your file is registered now.
and then refer that dll from Project------> Reference menu of VB IDE.
Next you need to create objects of the class and call its objects.
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 ...