te paso un ejemplo, 1 list1,1text1,1 commnad1
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Private Sub Command1_Click()
'buscamos el texto
For i = 0 To List1.ListCount - 1
List1.ListIndex = i
If List1.Text = Text1 Then Exit For
Next
If List1.Text <> Text1 Then MsgBox "No encontrado": List1.Selected(List1.ListIndex) = False
End Sub
Private Sub Form_Load()
'Agregamos elementos al listado
For i = 1 To 12
List1.AddItem MonthName(i)
Next