Visual Studio Visual Basic Code Error

Hello,
Getting error
         Error      2      Type 'SqlCommand' is not defined
from previous help on statment

Private Sub Testbutton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Testbutton.Click
        Dim colCmd As New SqlCommand
        Dim objConn As New SqlConnection("")
        Dim locTab As New DataTable

        Try
            objConn.Open()
            With colCmd
                .CommandType = CommandType.Text
                .CommandText = "INSERT INTO Settlement VALUES(" & PreviouAdvDepositstxtTextBox.Text & ", " & TransferGuestLedgertxt.Text & "," & Activityadvdeposittxt.Text & "," & transferfromadvdeposittxt.Text & ", " & transfromguesttoadvtxt.Text & "," & Advchangefrominctxt.Text & ")"
                .Connection = objConn
                .ExecuteNonQuery()
            End With
            objConn.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

Where should I put the   Imports System.Data.SqlClient  statment?

Thanks JK