Connect with access

Dim Table_ As String = "Table1"
Dim query As String = "SELECT * FROM " & Table_
Dim MDBConnString_ As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=TestDatabase.mdb;"
Dim ds As New DataSet
Dim cnn As OleDbConnection = New OleDbConnection(MDBConnString_)
cnn.Open()
Dim cmd As New OleDbCommand(query, cnn)
Dim da As New OleDbDataAdapter(cmd)
da.Fill(ds, Table_)
cnn.Close()
Dim t1 As DataTable = ds.Tables(Table_)

DataGridView1.DataSource = t1