You don't say what you want to do with the row info but this method which also populates the combobox for you will return values from the selected row using find......see attached.
Private Sub UserForm_Initialize()
With Sheets("Sheet1")
ComboBox1.List = Range(.Cells(1, 1), .Cells(1, 1).End(xlDown)).Value
End With
End Sub
Private Sub ComboBox1_Change()
Dim rng As Range
With Sheets("Sheet1")
Set rng = Range(.Cells(1, 1), .Cells(1, 1).End(xlDown))
End With
With rng.Find(ComboBox1, lookat:=xlWhole)
Label1.Caption = .Offset(, 1)
Label2.Caption = .Offset(, 2)
End With
End Sub