In the application's CMainFrame class, we handle XTPWM_DOCKINGPANE_NOTIFY, and look for XTP_PANE_ACTION. We want to handle any deactivation of the Property Pane. The code is like this:

if(wParam == XTP_DPN_ACTION) {

XTP_DOCKINGPANE_ACTION * pAction = (XTP_DOCKINGPANE_ACTION *)lParam;

// CString dbg; dbg.LoadStringA(pAction->pPane->GetID());

// TRACE3("%s: ID %d, action %d, ", dbg.GetBuffer(), pAction->pPane->GetID(), pAction->action);

if(pAction->pPane->GetID() == IDR_PANE_PROPERTIES) {

XTPDockingPaneAction action = pAction->action;

if(action == xtpPaneActionDeactivated) {

TRACE("Deactivating Property Pane\n");

CWnd * window = pAction->pPane->GetChild();

window->SendMessageToDescendants(WM_CFTPO_CLOSEVIEW);

}

}

}

This works well, with one exception. The problem we have is that we get this message, and fall into the "Deactivating Property Pane" code, if the user selects a value in a drop down calendar in a CXTPPropertyGridItemDate object.

It seems that the drop down calendar is a CWnd of its own, and that it therefore Posts the deactivation notification regarding the Property Grid, just as though it were some external window.

Is there a way to avoid this? If there was a way to tell if the xtpPaneActionDeactivated notification was provoked by a move into a Child window of the property pane, then notifications from a Calendar drop down could be ignored.

I am sure that we are not the only people using CXTPPropertyGridItemDates and trying to detect departures from the CXTPPropertyGrid -- has anyone else come across the issue?

Any help or hints appreciated,