Method for changing the Enter key to the Tab key in WinForm to achieve focus transfer

/// <summary>
/// Methods related to form control control/// </summary>
public class ControlTools
{
    private Form frm;

    public ControlTools(Form frm)
    {
       = frm;
    }
    /// <summary>
    /// Set the input of all subcontrols on the form to Tab    /// </summary>
    public void EnterToTab()
    {
       = true;

       += new KeyPressEventHandler(frm_KeyPress);
    }
    /// <summary>
    /// Register the KeyPress event of the form    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void frm_KeyPress(object sender, KeyPressEventArgs e)
    {
      if ( == (char))
      {
        (, true, true, true, true);
      }
    }
    /// <summary>
    /// Set the input of all subcontrols of a certain control (TextBox ComboBox) to Tab    /// </summary>
    /// <param name="groupControl">Container Control</param>    public void EnterToTab(Control groupControl)
    {
      foreach (Control control in )
      {
        if (control is TextBox || control is ComboBox)
           += new KeyPressEventHandler(control_KeyPress);
      }
    }
    /// &lt;summary&gt;
    /// Register the KeyPress event of the control    /// &lt;/summary&gt;
    /// &lt;param name="sender"&gt;&lt;/param&gt;
    /// &lt;param name="e"&gt;&lt;/param&gt;
    private void control_KeyPress(object sender, KeyPressEventArgs e)
    {
      if ( == 13)
      {
        ("{Tab}");
         = false;
      }
    }
}