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copied!<p>I would create my own class, inheriting from ListView to expose the Vertical and Horizontal scroll events.</p> <p>Then I would do create scroll handlers in my form to synchronize the two controls</p> <p>This is sample code which should allow a listview to publish scroll events:</p> <pre><code>public class MyListView : System.Windows.Forms.ListView { const int WM_HSCROLL = 0x0114; const int WM_VSCROLL = 0x0115; private ScrollEventHandler evtHScroll_m; private ScrollEventHandler evtVScroll_m; public event ScrollEventHandler OnHScroll { add { evtHScroll_m += value; } remove { evtHScroll_m -= value; } } public event ScrollEventHandler OnHVcroll { add { evtVScroll_m += value; } remove { evtVScroll_m -= value; } } protected override void WndProc(ref System.Windows.Forms.Message msg) { if (msg.Msg == WM_HSCROLL && evtHScroll_m != null) { evtHScroll_m(this,new ScrollEventArgs(ScrollEventType.ThumbTrack, msg.WParam.ToInt32())); } if (msg.Msg == WM_VSCROLL && evtVScroll_m != null) { evtVScroll_m(this, new ScrollEventArgs(ScrollEventType.ThumbTrack, msg.WParam.ToInt32())); } base.WndProc(ref msg); } </code></pre> <p>Now handle the scroll events in your form:</p> <p>Set up a PInvoke method to be able to send a windows message to a control:</p> <pre><code>[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int SendMessage(IntPtr hWnd, [MarshalAs(UnmanagedType.U4)] int iMsg, int iWParam, int iLParam); </code></pre> <p>Set up your event handlers (lstMaster and lstChild are two listboxes):</p> <pre><code>lstMaster.OnVScroll += new ScrollEventHandler(this.lstMaster_OnVScroll); lstMaster.OnHScroll += new ScrollEventHandler(this.lstMaster_OnHScroll); const int WM_HSCROLL = 0x0114; const int WM_VSCROLL = 0x0115; private void lstMaster_OnVScroll(Object sender, System.ScrollEventArgs e) { SendMessage(lstChild.Handle,WM_VSCROLL,(IntPtr)e.NewValue, IntPtr.Zero); } private void lstMaster_OnHScroll(Object sender, System.ScrollEventArgs e) { SendMessage(lstChild.Handle,WM_HSCROLL,(IntPtr)e.NewValue, IntPtr.Zero); } </code></pre>

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