UserForm: Enable Textbox When "Other" Selected in MultiSelect Listbox (Excel 2010)

Try this.. (untested)

Private Sub ListBox1_Click()
If ListBox1.Value = "Other" Then
        TextBox1.Enabled = True
        TextBox1.BackColor = &HFFFFFF
    Else
        TextBox1.Enabled = False
        TextBox1.BackColor = &H808080
        End If
 
End Sub