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    <p>The error "The calling thread cannot access this object because a different thread owns it." is quite standard for WinForms and WPF controls. </p> <p>In WPF and WinForms windows are rendered on the screen using one specific thread, usually called UI thread. Every update/change action regarding controls should take place on that thread to have success. </p> <p>Usual way to go with WinForms is to create a special delegate and call Control.Invoke as shown in this <a href="http://msdn.microsoft.com/en-us/library/zyzhdc6b%28v=vs.80%29.aspx">link</a>. </p> <p>As of WPF, same effect is achieved with the use of a <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.invoke.aspx">Dispatcher</a>. Your code should look like this:</p> <pre><code>this.Dispatcher.Invoke( () =&gt; svImages.ScrollToHorizontalOffset(svImages.HorizontalOffset - 0.1)); </code></pre> <p><strong>UPDATE:</strong></p> <p>I've got the following code to work in VB.NET:</p> <pre><code>Private Delegate Sub ScrollDelegate(ByVal offset As Double) Private Sub ScrollLeft(ByVal offset As Double) svImages.ScrollToHorizontalOffset(svImages.HorizontalOffset + offset) End Sub // ... calling from background thread Dim slt As ScrollDelegate slt = New ScrollDelegate(AddressOf ScrollLeft) Me.Dispatcher.Invoke(slt) </code></pre> <p><strong>Update 2</strong></p> <p>Code changed as to the question.</p> <pre><code>Dim ScrollLeft As Boolean = True Dim atimer As New System.Timers.Timer() Dim scrollMethod As ScrollDelegate Private Delegate Sub ScrollDelegate(ByVal offset As Double) // ... Me.InitializeComponent() slt = New ScrollDelegate(AddressOf DoScroll) // ... Private Sub timer_Tick(sender As Object, e As EventArgs) If ScrollLeft Then Me.Dispatcher.Invoke(slt, -1) Else Me.Dispatcher.Invoke(slt, 1) End If End Sub // ... Private Sub DoScroll(ByVal offset As Double) svImages.ScrollToHorizontalOffset(svImages.HorizontalOffset + offset) End Sub </code></pre>
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    1. CO-1 Your code failed to compile in Visual Studio 2010. VS said 'Declaration expected'
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    2. CO@Down la la tech I only gave a snippet.. the declarations are Dim ScrollLeft As Boolean = True and Dim atimer As New System.Timers.Timer()
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    3. CO@Dmitriy Reznik. I have converted your suggestion to VB which gives Me.Dispatcher.Invoke(Function() svImages.ScrollToHorizontalOffset(svImages.HorizontalOffset - 0.1)) unfortunately the part svImages.ScrollToHorizontalOffset(svImages.HorizontalOffset - 0.1 is showing with blue wavy line in VS2010 and a tooltip saying Expression does not produce a value. Any suggestions...
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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