set_get_value.cs

using Microsoft.Win32;
private void button1_Click(object sender, EventArgs e)
{
      int? XMI_Transactions = (int?)Registry.GetValue(@"HKEY_CURRENT_USER\Software\Sparx Systems\EA400\EA\OPTIONS", "XMI_USE_TRANSACTION", null);
      if (XMI_Transactions == null)
      {
          MessageBox.Show("EA is not installed");
          return;
      }
      Registry.SetValue(@"HKEY_CURRENT_USER\Software\Sparx Systems\EA400\EA\OPTIONS", "XMI_USE_TRANSACTION", 0);
}