public static extern uint SendMessage(IntPtr hWnd, int Msg, int wParam, ref REBARINFO lParam);
protected void UpdateImageList() { if(_rebar != null) { REBARINFO RBInfo = new REBARINFO(); RBInfo.cbSize = (uint)Marshal.SizeOf(RBInfo); RBInfo.fMask = (uint)RebarImageListConstants.RBIM_IMAGELIST; if(_imageList == null) { RBInfo.himl = IntPtr.Zero; } else { RBInfo.himl = _imageList.Handle; } if(User32Dll.SendMessage(_rebar.Handle, (int)WindowsMessages.RB_SETBARINFO, 0,ref RBInfo)==0) { int LastErr = Marshal.GetHRForLastWin32Error(); try { Marshal.ThrowExceptionForHR(LastErr); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine(LastErr + " " + ex.Message); if (_throwExceptions) throw(new Exception("Error Setting Imagelist.", ex)); } } } }