private void ByByWindow(object sender, EventArgs e)
 {
     if (sender == EmpForm)
     {
         EmpForm = null;
     }
     if (sender == PayForm)
     {
         PayForm = null;
     }
     if (sender == TrainForm)
     {
         TrainForm = null;
     }
     if (sender == SkedForm)
     {
         SkedForm = null;
     }
 }
        private void OpenWindow(object sender, EventArgs e)
        {
            MenuItem m;

            if (sender is MenuItem)
            {
                m = (MenuItem)sender;
            }
            else
            {
                return;
            }

            if (m == mnuEmp)
            {
                if (EmpForm == null)
                {
                    EmpForm           = new Employee();
                    EmpForm.MdiParent = this;
                    EmpForm.Disposed += new EventHandler(this.ByByWindow);
                    EmpForm.Show();
                }
                else
                {
                    EmpForm.Focus();
                }
            }

            if (m == mnuTrain)
            {
                if (TrainForm == null)
                {
                    TrainForm           = new Training();
                    TrainForm.MdiParent = this;
                    TrainForm.Disposed += new EventHandler(this.ByByWindow);
                    TrainForm.Show();
                }
                else
                {
                    TrainForm.Focus();
                }
            }

            if (m == mnuPayroll)
            {
                if (PayForm == null)
                {
                    PayForm           = new Payroll();
                    PayForm.MdiParent = this;
                    PayForm.Disposed += new EventHandler(this.ByByWindow);
                    PayForm.Show();
                }
                else
                {
                    PayForm.Focus();
                }
            }

            if (m == mnuSked)
            {
                if (SkedForm == null)
                {
                    SkedForm           = new Scheduling();
                    SkedForm.MdiParent = this;
                    SkedForm.Disposed += new EventHandler(this.ByByWindow);
                    SkedForm.Show();
                }
                else
                {
                    SkedForm.Focus();
                }
            }
        }