C#

public int GetNumberOfRows( )
        {
            if (excelWorksheet == null)
                return (-1);

            return (excelWorksheet.Rows.Count);                      
        }

        //Constructor from the Where page
        public frmMain(ArrayList isChecked)
        {
            InitializeComponent();

            this.checkedNames = isChecked; //This works perfect to here.
            //The code then returns to close the window and then comes back
            //to the scipt below
        }

//******* This is where the code starts *********


private void buttonWhere_Click(object sender, EventArgs e)
        {
            for (int iItem = 0; iItem <= listViewColumns.Items.Count - 1; iItem++)
            {
                colNames.Add(listViewColumns.Items[iItem].SubItems[0].Text);
            }

            //Send the column names to the new window page for selection in a check list box
            Where w = new Where(colNames); 
            w.ShowDialog();
        
            //Page then goes to the windows page and the returns to the constuctor where the values 
            //have transfered correctly and propogated the Arraylist checkedNames correctly!  The action then 
            //returns to the window page to close it and then comes back to this point. 

            //Return from the window page starts here
            foreach (string name in checkedNames)
            {
                //At this point, the checkedNames Code has turned to null.  It seems to have happened after the 
                //window page was closed.  If that is the case, how do I get the values from that to this page
                //so I can use the selected values in the code!!
            }
        }