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    <p>I wanted to do the same thing, and after searching around I found your code here, which helped, but of course didn't solve the problem. But after playing around with it, I have found a solution.</p> <p>The key came when I realized that since the scroll buttons work, that you can use that to make the slider work. In other words, when the SB_THUMBTRACK event comes in, I issue repeated SB_LINELEFT and SB_LINERIGHT events until my child ListView gets close to where the master is. Yes, this isn't perfect, but it works close enough.</p> <p>In my case, my master ListView is called "reportView", while my child ListView is called "summaryView". Here's my pertinent code:</p> <pre><code>public class MyListView : ListView { public event ScrollEventHandler HScrollEvent; protected override void WndProc(ref System.Windows.Forms.Message msg) { if (msg.Msg==WM_HSCROLL &amp;&amp; HScrollEvent != null) HScrollEvent(this,new ScrollEventArgs(ScrollEventType.ThumbTrack, (int)msg.WParam)); base.WndProc(ref msg); } } </code></pre> <p>And then the event handler itself:</p> <pre><code>reportView.HScrollEvent += new ScrollEventHandler((sender,e) =&gt; { if ((ushort) e.NewValue != SB_THUMBTRACK) SendMessage(summaryView.Handle, WM_HSCROLL, (IntPtr) e.NewValue, IntPtr.Zero); else { int newPos = e.NewValue &gt;&gt; 16; int oldPos = GetScrollPos(reportView .Handle, SB_HORZ); int pos = GetScrollPos(summaryView.Handle, SB_HORZ); int lst; if (pos != newPos) if (pos&lt;newPos &amp;&amp; oldPos&lt;newPos) do { lst=pos; SendMessage(summaryView.Handle,WM_HSCROLL,(IntPtr)SB_LINERIGHT,IntPtr.Zero); } while ((pos=GetScrollPos(summaryView.Handle,SB_HORZ)) &lt; newPos &amp;&amp; pos!=lst); else if (pos&gt;newPos &amp;&amp; oldPos&gt;newPos) do { lst=pos; SendMessage(summaryView.Handle,WM_HSCROLL,(IntPtr)SB_LINELEFT, IntPtr.Zero); } while ((pos=GetScrollPos(summaryView.Handle,SB_HORZ)) &gt; newPos &amp;&amp; pos!=lst); } }); </code></pre> <p>Sorry about the odd formatting of the while loops there, but that's how I prefer to code things like that.</p> <p>The next problem was getting rid of the scroll bars in the child ListView. I noticed you had a method called HideScrollBar. This didn't really work for me. I found a better solution in my case was leaving the scroll bar there, but "covering" it up instead. I do this with the column header as well. I just slide my child control up under the master control to cover the column header. And then I stretch the child to fall out of the panel that contains it. And then to provide a bit of a border along the edge of my containing panel, I throw in a control to cover the visible bottom edge of my child ListView. It ends up looking rather nice.</p> <p>I also added an event handler to sync changing column widths, as in:</p> <pre><code>reportView.ColumnWidthChanging += new ColumnWidthChangingEventHandler((sender,e) =&gt; { summaryView.Columns[e.ColumnIndex].Width = e.NewWidth; }); </code></pre> <p>While this all seems a bit of a kludge, it works for me.</p>
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