Verify fields of a class

[Sunil Menon]

Dear All,
I have a class

Public class ClassA
Public Age as integer = 0
Public Name as String = ""
Public Salary as integer = 0
End class

I create the Object of this class
Dim oBj as new ClassA

I have a function that takes some parameters one being the field name

Function FillDetails ( byval ..., byref fieldname as Object,...)

When the application programmer calls this function
FillDetails(...,oBj.Age,...)

My function wants to compare if the pass field exists in the class
Object defined in the function

Dim fldList() As System.Reflection.FieldInfo =
myObj.GetType.GetFields()
Count =0
While Count < _fldList.Length - 1
If Field Is _fldList(Count).GetValue(myObj) Then
strField = _fldList(Count).Name
Exit While
Else
'do nothing
End If
Count = Count + 1
End While

This function works well if pass a class having fields that are
userdefined...but for a simple class like mentioned above it fails...

Could someone please help?

TALIA
Many Regards
Sunil