Event and delegate

[Pranav23578]

I am working on window based application.I am using 3 forms say Form1,2 and 3. When I click at some control of Form1 Form2 is opened and when I click at some control of Form2 ,Form3 is opened.StartUp form is Form1.On Form1 I am trying to set a property of Form3 and display it on a textbox of form3.Below is what I am doing:-
namespace Form1.Forms
{
public delegate void ReferenceCellAd dressDelegate(s tring CellReference);

public partial class frmLinkingStep : DI5_DAForm.DAFo rm
{

public event ReferenceCellAd dressDelegate SelectedCell;
}
private void CellSelectionCh anged(string cellAddress)
{

this.CellAddres s = cellAddress;
this.SelectedCe ll(this.CellAdd ress); *****Run time error here****
}

basically i m trying to display cell address on form3 as
//this code i wrote in form 3.
public Form3()
{
InitializeCompo nent();

SetEventHandler ();
}
private void SetEventHandler ()
{
LinkingStepForm = new frmLinkingStep( );
this.LinkingSte pForm.SelectedC ell += new ReferenceCellAd dressDelegate(S electedCell);
}

I am getting a run time error as source code not avialable at current location and Selected cell value is null.What wrong i m doing.

[kenobewan]

Write out the value of this.CellAddres s.