Function vtkHandleMessage2

Rendering/UI/vtkWin32RenderWindowInteractor.cxx:1035–1186

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//------------------------------------------------------------------------------
LRESULT CALLBACK vtkHandleMessage2(
  HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, vtkWin32RenderWindowInteractor* me)
{
  if ((uMsg == WM_USER + 13) && (wParam == 26))
  {
    // someone is telling us to set our OldProc
    me->OldProc = (WNDPROC)lParam;
    return 1;
  }

  int handled(0);

  switch (uMsg)
  {
    case WM_PAINT:
    {
      const LRESULT ret(CallWindowProc(me->OldProc, hWnd, uMsg, wParam, lParam));
      me->InvokeEvent(vtkCommand::RenderEvent, nullptr);
      return ret;
    }

    case WM_SIZE:
      handled = me->OnSize(hWnd, wParam, LOWORD(lParam), HIWORD(lParam));
      break;

    case WM_LBUTTONDBLCLK:
      handled = me->OnLButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 1);
      break;

    case WM_LBUTTONDOWN:
      handled = me->OnLButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 0);
      break;

    case WM_LBUTTONUP:
      handled = me->OnLButtonUp(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y);
      break;

    case WM_MBUTTONDBLCLK:
      handled = me->OnMButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 1);
      break;

    case WM_MBUTTONDOWN:
      handled = me->OnMButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 0);
      break;

    case WM_MBUTTONUP:
      handled = me->OnMButtonUp(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y);
      break;

    case WM_RBUTTONDBLCLK:
      handled = me->OnRButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 1);
      break;

    case WM_RBUTTONDOWN:
      handled = me->OnRButtonDown(hWnd, wParam, MAKEPOINTS(lParam).x, MAKEPOINTS(lParam).y, 0);
      break;

    case WM_RBUTTONUP: