Hi,

I have 2 ListViews, one above the other, and I need to keep them
horizontally synchronised.
I managed to hide the bottom LV scrollbar (user is not supposed to
scroll it) and to scroll it when user clicks on the scollbar or
scrollbar arrows. However, the scrollbar does not move when the user
keep the scrollbar thingy (I don't know the right word) and move it
without releasing the mouse. And unfortunately, that's the easiest way
of scrolling !!!

Here is my code for the "chief listview" :

*************************************************************
public class ScrollerListView : System.Windows.Forms.ListView
        {

                #region DLL IMPORT
                [DllImport("user32")]
                static extern IntPtr SendMessage(IntPtr Handle, Int32
msg, IntPtr
wParam, IntPtr lParam);

                [DllImport("user32.dll", SetLastError=true) ]
                private static extern int GetScrollInfo(IntPtr hWnd,
int n, ref
ScrollInfoStruct lpScrollInfo);

                [DllImport("user32.dll")]
                static extern int SetScrollInfo(IntPtr hwnd, int fnBar,
ref
ScrollInfoStruct lpsi, bool fRedraw);

                private struct ScrollInfoStruct
                {
                        public int cbSize;
                        public int fMask;
                        public int nMin;
                        public int nMax;
                        public int nPage;
                        public int nPos;
                        public int nTrackPos;
                }

                const int SB_LINELEFT = 0;
                const int SB_LINERIGHT = 1;
                const int SB_PAGELEFT = 2; //same value as SB_PAGEUP
                const int SB_PAGERIGHT = 3; //same value as SB_PAGEDOWN
                const int SB_THUMBPOSITION = 4;
                const int SB_THUMBTRACK = 5;
                const int SB_LEFT = 6;
                const int SB_RIGHT = 7;
                const int SB_ENDSCROLL = 8;
                const int WM_HSCROLL = 0x0114;

                const int SBS_HORZ = 0;
                const int SBS_VERT = 1;

                private const int SIF_RANGE = 0x1;
                private const int SIF_PAGE = 0x2;
                private const int SIF_POS = 0x4;
                private const int SIF_TRACKPOS = 0x10;
                private const int SIF_ALL = SIF_RANGE | SIF_PAGE |
SIF_POS |
SIF_TRACKPOS;

                #endregion

                protected ListView _attachedLV;

                public ScrollerListView(ListView attachedLV)
                {
                        _attachedLV = attachedLV;
                }

                protected override void WndProc(ref Message m)
                {
                        if(m.Msg == WM_HSCROLL)
                        {
                                // Scroll other listview
                                if (_attachedLV != null)
                                {
                                        // Send scroll message to
attached listview
                                        SendMessage(_attachedLV.Handle,
m.Msg, m.WParam, m.LParam);

                                        Should move other scrollbar but
does not work :(
                                        if (m.WParam.ToInt32() ==
SB_THUMBTRACK
                                        {
                                                ScrollInfoStruct si =
new ScrollInfoStruct();
                                                si.fMask = SIF_RANGE |
SIF_PAGE | SIF_POS;
                                                si.cbSize =
Marshal.SizeOf(si);

GetScrollInfo(this.Handle, SBS_HORZ, ref si);


SetScrollInfo(_attachedLV.Handle, SBS_HORZ, ref si, true);
                                        }
                                }
                        }
                        base.WndProc(ref m);
                }
        }

*************************************************************

I hope someone will be able to help me on this one :(

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