不是很清楚的说哈
但是我认为你可以查一查虚拟键盘表哈
然后不防自己编写事件。

把控件的AcceptButton设置为那个按钮即可

Private Sub TextBox2_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox2.KeyDown
        If e.KeyValue = 13 Then
            '加入你自己要处理的事件代码
        End If
    End Sub

Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
        If e.KeyCode = Keys.Enter Then
            MessageBox.Show("按下了回车键！！！")
        End If
End Sub