Disable Button If Combox Input Deleted
<p>In my project, I have a few textbox inputs, and some combo boxes with maybe 2 indexed items on a form. There's a button I'm disabling on load if no input is supplied to both textbox inputs, and it works great even if I delete out any text. However, I'm having issues with forcing the combo box to behave in the same manner. This work however:</p>

<pre><code>Private Sub cboPickShirts_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboPickShirts.SelectedIndexChanged

    InputCheck_3 = True

    If cboPickShirts.SelectedIndex &lt; 0 Then
        InputCheck_3 = False

    End If

    If InputCheck_3 = False Then
        btnInputResult.Enabled = False

    ElseIf InputCheck_3 = True Then
        btnInputResult.Enabled = True

    End If
End Sub
</code></pre>

<p>I have <code>InputCheck_3</code> set up as a global variable in a <code>Public Module</code>. On form load, I'm disabling my button and it doesn't enable until I select one of the indexed items. My struggle to get the button disable again if any combo box text is entered and deleted out, leaving it null or empty. Any thoughts on what I'm missing or what I can add to get results? I guess I need a variable or event to notice the change (entering &amp; deletion of text).</p>