C#

m_objPrintThread = new PrintThread(m_objUV, this, m_sRecKey, m_DailyRec);
m_objPrintThreadID = new Thread(m_objPrintThread.ThreadStart);


m_objPrintThreadID.Start();

namespace CashRec
{
    public delegate bool PrintCashRec(); // Delegate

    class PrintThread
    {
        UONET m_objUV;
        string m_sKey, m_sRec;
        frmMain m_form;
        volatile bool m_bShouldStop = false;       
 
        public PrintCashRec m_PrintRec;

        public PrintThread(UONET objUV, frmMain form, string sKey, string sRec)
        {
            m_form = form;
            m_objUV = objUV;
            m_sKey = sKey;
            m_sRec = sRec;
            m_PrintRec = new PrintCashRec(Print);
        }

        public void ThreadStart()
        {
            while (!m_bShouldStop)
            {
                Thread.Sleep(500);
            }
        }

        public void ThreadStop()
        {
            m_bShouldStop = true;
        }

        private Boolean Print()
        {
            bool bSuccessful = false;

            while (!bSuccessful)
            {
                  // Logic Here
            }

            return bSuccessful;
        }

private void mnuPrint_Click(object sender, EventArgs e)
{
    if (m_objPrintThread == null)
    {
        if (StartPrintThread())
            m_objPrintThread.m_PrintRec;
    }
    else
        m_objPrintThread.m_PrintRec;
}