title: show/hide textbox if comboxbox is null or not
body: <p>first of all i want to say thanks for every person who respond me for my previous quesiton,
  i have a combobox (list) and a textbox(key1), but i want to enable textbox IF combobox is not null, I tried to to this by this code</p>
  
  <pre><code>  Private Sub TextBox1_Change()
  
  If IsNullOrEmpty(ComboBox1.Text) Then
  
  TextBox1.Visible = False
  TextBox1.Enabled = False
  
  
  Else
  TextBox1.Visible = True
  TextBox1.Enabled = True
  End If
  
  
  End Sub
  </code></pre>
  
  <p>but the result is always the textbox1 is disabled, even if i choose from the list or combobox&lt;>null</p>