Calling a windows form controls from another windows form .

namespace InventoryMnt
{
    public partial class<big> frmAdminIndex : Form</big>
    {
        Sales2Method salesMethod = new Sales2Method();

        public frmAdminIndex()
        {
            InitializeComponent();
        }
        public frmAdminIndex(string Emp1)
        {
            InitializeComponent();
            Emp = Emp1;

        }

        public frmAdminIndex(string Emp1, string pass)
        {
            InitializeComponent();
            User = Emp1;
            Pass = pass;
        }

        public void Control1()
        {
            this.oldGoldToolStripMenuItem.Visible = false;

        }
        public string Emp
        {
            set
            {
                <big>this.txtemp.Text = value;
                this.aDMINISTRATIONToolStripMenuItem.Visible = false;
                this.reportsToolStripMenuItem.Visible = false;
                this.backUpToolStripMenuItem.Visible = false;
                this.accountsToolStripMenuItem.Visible = false;
               
                this.inventoryToolStripMenuItem1.Visible = true;
                this.stockEntryToolStripMenuItem1.Visible = true;
                this.stockReturnToolStripMenuItem1.Visible = true;
                this.salesToolStripMenuItem1.Visible = true;</big>
               
            }
        }

public partial class <big>frmDashBoard : Form</big>
    {

        public frmDashBoard()
        {
            InitializeComponent();
        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            ///Here I have to type the code to control tool strip item in frmAdminIndex 

        }
    }
}