通过重写 ProcessCmdKey 方法

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            int WM_KEYDOWN = 256;
            int WM_SYSKEYDOWN = 260;
            if (msg.Msg == WM_KEYDOWN | msg.Msg == WM_SYSKEYDOWN)
            {
                switch (keyData)
                {
                    case Keys.Enter:
                        base.ProcessDialogKey(Keys.Tab);
                        break;
                    default:
                        return base.ProcessCmdKey(ref msg, keyData);
                }
            }
            return false;
        }
    }