VS 2010 Adding references to custom structures for testing

I have a VS2012 Visual Basic.NET application and am wanting to create some unit tests for this application.

Here is the module code:

Code:

Imports System.IO



Namespace modCanMediaStructures



Module modCanMediaStructures



    <Serializable()> Public Structure MediaItem

        Dim longMediaID As Long

        Dim MediaObject As WMPLib.IWMPMedia

        Dim FileInfoObject As FileInfo

        Dim stringGenre As String

        Dim stringMediaDuration As String

        Dim doubleMediaLength As Double

    End Structure



    <Serializable()> Public Structure MediaPlayList

        Dim stringMediaPlayListName As String

        Dim stringMediaPlayListDescription As String

        Dim stringMediaPlayListComments As String

        Dim mediaItemList As List(Of MediaItem)

        Dim stringPlayListDuration As String

        Dim doublePlayListDuration As Double

        Dim booleanShuffle As Boolean

        Dim booleanLoop As Boolean

    End Structure



    Public Structure genreItem

        Dim stringGenreName As String

        Dim longGenreCount As Long

        Dim doubleGenreDuration As Double

    End Structure



    <Serializable()> Public Structure ScheduleItem

        Dim stringItemName As String

        Dim stringItemPlaylist As String

        Dim stringItemDuration As String

        Dim stringItemComments As String

        Dim doubleItemDuration As Double

        Dim booleanStartDateIsDerivedFromEndOfOtherScheduleItem As Boolean

        Dim stringScheduleItemThatStartDateIsDerivedFrom As String

        Dim dateItemStartDateTime As Date

        Dim dateItemEndDateTime As Date

        Dim booleanEndDateIsDerivedFromPlayListDuration As Boolean

    End Structure



End Module



End Namespace

In my main form, I declare a variable as follows:

Code:

Dim testMediaItem As modCanMediaStructures.MediaItem

After importing the following statement:

Code:

Imports modCanMediaStructures

This works. However, when I do the same statement in the UnitTest test, the following error occurs:

Quote:

Type 'modCanMediaStructures.MediaItem' is not defined

Here is my code:

Code:

Imports System.Text

Imports Microsoft.VisualStudio.TestTools.UnitTesting

Imports CanMediaPlayer

Imports modCanMediaStructures



<TestClass()> Public Class MediaListTests



<TestMethod()> Public Sub TestaddMediaItemToList()



    Dim myStructure As New modCanMediaStructures.MediaItem



End Sub



End Class

I believe that this is happeneing because the UnitTest Project cannot actually 'see' the code in the other solution files.

May I please have some help to get this working?