protected override void WndProc(ref Message m) { if (m.Msg == (WM_REFLECT + WM_NOTIFY)) { NMHDR hdr = (NMHDR)(Marshal.PtrToStructure(m.LParam, typeof(NMHDR))); if (hdr.code == TCN_SELCHANGING) { TabPage tp = TestTab(PointToClient(Cursor.Position)); if (tp != null) { TabPageChangeEventArgs e = new TabPageChangeEventArgs(SelectedTab, tp); if (SelectedIndexChanging != null) { SelectedIndexChanging(this, e); } if (e.Cancel || tp.Enabled == false) { m.Result = new IntPtr(1); return; } } } } base.WndProc(ref m); }
protected override void WndProc(ref Message m) { if (m.Msg == (WM_REFLECT + WM_NOTIFY)) { NMHDR hdr = (NMHDR)(Marshal.PtrToStructure(m.LParam, typeof(NMHDR))); if (hdr.code == TCN_SELCHANGING) { TabPage tp = TestTab(PointToClient(Cursor.Position)); if (tp != null) { TabPageChangeEventArgs e = new TabPageChangeEventArgs(SelectedTab, tp); if (SelectedIndexChanging != null) SelectedIndexChanging(this, e); if (e.Cancel || tp.Enabled == false) { m.Result = new IntPtr(1); return; } } } } base.WndProc(ref m); }