Visual Basic.NET - combobox list

ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList
If ComboBox1.SelectedItem = "" Then
variable =valor
End If



Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ComboBox5.SelectedItem = ""
ComboBox4.SelectedItem = ""
End Sub

Y qué con eso?. cual es tu consulta o aporte?.