>How did you create the custom control? Is it sub-classed from UserControl? It probably should be if it's not. And how did you create the dispose method? Did you override the base class Dispose?

Here is my (Hidden) Class Signature:

Partial Class clsExamSelection
    Inherits System.Windows.Forms.UserControl
.
.
.
End Class

Here is my visible Class code:

Public Class clsExamSelection : Implements IDisposable

    Public Overloads Sub Dispose()
        '************************************************************************
        ' Procedure/Function: Dispose()
        ' Author: Ben Santiago
        ' Last Revision: 02/23/2007
        ' Description:
        '       Disposes of internal resources (if any) and prevents the Finalize
        '       routine from running so that the GarbageCollector doesn't attempt
        '       to dispose this object again.
        '************************************************************************

        Dispose(True)
        GC.SuppressFinalize(Me)
    End Sub

    Protected Overridable Overloads Sub Dispose(ByVal Disposing As Boolean)
        '************************************************************************
        ' Procedure/Function: Dispose()
        ' Author: Ben Santiago
        ' Last Revision: 02/23/2007
        ' Description:
        '       Manually disposes additional objects if needed.
        '************************************************************************

        Try
            If Disposing Then
                '***************************************
                ' Dispose Of Individual Components
                '***************************************
                If components IsNot Nothing Then
                    components.Dispose()
                End If
            End If

            '***************************************
            ' Remove Private DataSet
            '***************************************
            MessageBox.Show("Removing DataSet")
            Me.PrivateDataSet_Destroy()
        Finally
            '***************************************
            ' Call Base Dispose Method
            '***************************************
            MyBase.Dispose(Disposing)
        End Try
    End Sub

    Protected Overrides Sub Finalize()
        '************************************************************************
        ' Procedure/Function: Finalize()
        ' Author: Ben Santiago
        ' Last Revision: 02/23/2007
        ' Description:
        '       Auto dispose this object when nothing references this object, 
        '       using Garbage Collection.
        '************************************************************************

        Dispose(False)
    End Sub

End Class