VS 2008 - Comparing Data Using ADO.NET

How can I compare the data using ADO.NET. I have wrote the following code but don't know what to do next
Code:
Sub LoginCheck()
Dim Conn As OleDbConnection
Dim DbCmd As OleDbCommand
Dim SqlCmd As String
Dim DbRead As OleDbDataReader
Dim MyDbPath As String
MyDbPath = "C:Documents and SettingsAdministratorMy DocumentsVisual Studio 2008WebSitesHwManApp_Data/hwMan.mdb"
Conn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=" & MyDbPath)
Conn.Open()
SqlCmd = "Select * from UserInfo where UserId='" & txtUserName.Text & "' and UserPass='" & txtPassword.Text & "'"
DbCmd = New OleDbCommand(SqlCmd, Conn)
End Sub