Pues para hacer delete insert y update podes usar un comando:
Dim sBase As String = txtFic.Text
Dim sUpdate As String = "update clientes (nombre, edad) values('Juan',34)"
Dim sConn As String
sConn = "Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=" & _
System.IO.Path.GetDirectoryName(sBase) & ";"
Using dbConn As New System.Data.Odbc.OdbcConnection(sConn)
dbConn.Open()
Dim xComandoAs New OdbcCommand(sUpdate, dbConn )
xComando.ExcecuteNonQuery()
Y listo
http://msdn.microsoft.com/es-es/libr...nd(VS.80).aspx