Fetching Page controls Dynamically + vb.net

How to fetch Page controls of web form Dynamically in vb.net

To Find the Page Controls in a Web Page

Public Function FindPageControl(ByVal oControlCollection As ControlCollection, ByVal strPageName As String) AsArrayList
' Traverses all the controls in the page
For Each oControl As Control In oControlCollection
DisplayControlName(oControl, strPageName)
FindPageControl(oControl.Controls, strPageName)
Next
Return ArrayLst
End Function
How to call this function

FindPageControl(Page.Controls, strPgName)