C#

gacutil.exe /l "AssemblyName"

Form form1 = new Form();
form1.ShowDiealog();

// Not tested, writing from memory;
public class testForm : Form
{
   ...
   public bool opend;

   private void testForm_OnLoad(Object sender, EventArgs e)
   {
      opend = true;
   }

   private void testForm_OnClosing(Object sender, EventArgs e)
   {
      opend = false;
   }
   ...
}

// class scope wariable - Same as testForm.opend. At least i think it is called class scope.
testForm form1 = new testForm(1);
// Inside menu item method click.
if (!form1.opend)
   form1.Show();
else
   form1.Focus();

textbox1.Text = (Convert.ToInt32(textbox1.Text)+1).ToString();

mjawadkhatri wrote:

textbox should autogenerate a number everytime when user insert new record