Oops, I forgot the param.

As far as the implemenation, when I complile I get:

'ConnectionString' cannot implement 'ConnectionString' because there is no matching function on interface 'IDbConnection'.

Not sure why this is. I checked the interface, and ConnetionString is a member.

In my code, on the lines that are propertiesm there are blue wavy lines
under the implemented name:

There is a blue wavy line under System.Data.IDbConnection

Does this mean that the system does not recognise the text?

I have re-pasted my code:

Public Class VfpConnection

    Implements System.Data.IDbConnection

    ' Properties
    Public Function ConnectionString() As String() _
        Implements IDbConnection.ConnectionString
        ' Place code here
        Return Nothing
    End Function

    Public Function ConnectionTimeOut() As String() _
        Implements IDbConnection.ConnectionTimeOut
        ' Place code here
        Return Nothing
    End Function

    Public Function Database() As String() _
        Implements IDbConnection.Database
        ' Place code here
        Return Nothing
    End Function

    Public Function State() As String() _
        Implements IDbConnection.State
        ' Place code here
        Return Nothing
    End Function

    Public Overloads Function BeginTransaction() As IDbTransaction _
        Implements IDbConnection.BeginTransaction
        ' Place code here
        Return Nothing
    End Function

    Public Overloads Function BeginTransaction(ByVal level As System.Data.IsolationLevel) _
        As IDbTransaction _
        Implements IDbConnection.BeginTransaction
        ' Place code here
        Return Nothing
    End Function

    Public Sub ChangeDatabase(ByVal DatabaseName As String) _
        Implements IDbConnection.ChangeDatabase
        ' Place code here
    End Sub

    Public Sub Close() _
        Implements IDbConnection.Close
    End Sub

    Public Function CreateCommand() As IDbCommand _
        Implements IDbConnection.CreateCommand
        ' Place code here
        Return Nothing
    End Function

    Public Sub Open() _
        Implements IDbConnection.Open
        ' Place code here
    End Sub

    Public Property ConnectionString() As String Implements System.Data.IDbConnection.ConnectionString
        Get

        End Get
        Set(ByVal Value As String)

        End Set
    End Property

    Public ReadOnly Property ConnectionTimeout() As Integer Implements System.Data.IDbConnection.ConnectionTimeout
        Get

        End Get
    End Property

    Public ReadOnly Property Database() As String Implements System.Data.IDbConnection.Database
        Get

        End Get
    End Property

    Public ReadOnly Property State() As System.Data.ConnectionState Implements System.Data.IDbConnection.State
        Get

        End Get
    End Property

    Public Sub Dispose() Implements System.IDisposable.Dispose

    End Sub
End Class 'VfpConnection

>Kevin,
>
>If you look at the docs for IDBConnection, you'll see that the ChangeDatabase() method requires a parameter and you have no paramter in your method. I don't know if it's a typo on your part, or in the book, but fix that (and also implement the property that you're erroring on, ConnectionString) and you should be good to go.
>
>~~Bonnie
>
>
>
>>I have Kevin McNeish' book '.Net for Visual FoxPro Developers' and I typed in the
>>code on page 141 (pasted below) into a VB class.
>>
>>When I compile, I get the following errors:
>>'ChangeDatabase' cannot implement 'ChangeDatabase' because there is no matching sub on interface 'IDbConnection'.
>>'ConnectionString' cannot implement 'ConnectionString'...
>>'ConnectionTimeOut' cannot implement 'ConnectionTimeOut'...
>>'State' cannot implement 'State'...
>>
>>and 5 more like this:
>>
>>'VfpConnection.VfpConnection' must implement 'Overridable Property ConnectionString() As String' for interface 'System.Data.IDbConnection'. Implementing property must have matching 'ReadOnly'/'WriteOnly' specifiers.
>>
>>
>>What am I doing wrong?
>>
>>
>>
>>
>>Public Class VfpConnection
>>
>> Implements System.Data.IDbConnection
>>
>> ' Properties
>> Public Function ConnectionString() As String() _
>> Implements IDbConnection.ConnectionString
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Function ConnectionTimeOut() As String() _
>> Implements IDbConnection.ConnectionTimeOut
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Function Database() As String() _
>> Implements IDbConnection.Database
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Function State() As String() _
>> Implements IDbConnection.State
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Overloads Function BeginTransaction() As IDbTransaction _
>> Implements IDbConnection.BeginTransaction
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Overloads Function BeginTransaction(ByVal level As System.Data.IsolationLevel) _
>> As IDbTransaction _
>> Implements IDbConnection.BeginTransaction
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Sub ChangeDatabase() _
>> Implements IDbConnection.ChangeDatabase
>> ' Place code here
>> End Sub
>>
>> Public Sub Close() _
>> Implements IDbConnection.Close
>> End Sub
>>
>> Public Function CreateCommand() As IDbCommand _
>> Implements IDbConnection.CreateCommand
>> ' Place code here
>> Return Nothing
>> End Function
>>
>> Public Sub Open() _
>> Implements IDbConnection.Open
>> ' Place code here
>> End Sub
>>
>>End Class 'VfpConnection