INTERCEPTION DU CLICK DROIT SUR LISTVIEW (DIFFÉRENCIER LE CLICK SUR L'ENTÊTE COLONNE, L'ITEM ET LES SUBITEMS)

    private void SubClasserCallBack(object sender,CallBackArgs Args)
        {
            //System.Diagnostics.Debug.Print(Args.m.Msg.ToString());
            //Console.WriteLine(Args.m.HWnd.ToString());
            const int WM_CONTEXTMENU = 0x7B;

            switch (Args.m.Msg)
            {
                case WM_CONTEXTMENU: //interception du click droit
                    HD_HITTESTINFO HTI = new HD_HITTESTINFO() ;

                    const int LVM_FIRST = 0x1000;
                    const int LVM_GETHEADER = (LVM_FIRST + 31);

                    const int HDM_FIRST = 0x1200;
                    const int HDM_HITTEST = (HDM_FIRST + 6);

                    const int HHT_ONHEADER = 0x2;
                    const int HHT_ONDIVIDER = 0x4;

                    int hHeader = 0;

                    if (listView1.View == View.Details)
                    {
                        hHeader = SendMessage(listView1.Handle, LVM_GETHEADER, 0, IntPtr.Zero);
                    }

                    if (hHeader > 0)
                    {
                        HTI.flags = HHT_ONHEADER | HHT_ONDIVIDER;
                        HTI.pt.X = listView1.PointToClient(System.Windows.Forms.Cursor.Position).X;
                        HTI.pt.Y = listView1.PointToClient(System.Windows.Forms.Cursor.Position).Y;

                        SendMessage(hHeader, HDM_HITTEST, 0,ref HTI);
                    }

                    //localisation du click
                    if ((hHeader>0) && (HTI.iItem > -1))
                    {
                        //click sur header
                        MessageBox.Show("Header");
                    }
                    else if (listView1.SelectedItems.Count == 0)
                    {
                        //click sur un subitem
                        MessageBox.Show("subitem");
                    }
                    else if (listView1.SelectedItems.Count >= 1)
                    {
                        //click sur un item
                        MessageBox.Show("item");
                    
                    }
                    break; 
            }
        }