Is there a way to pervent the user from Collapsing a category?

I ended up making the following changes to get it to do that.

CXTPPropertyGridItem* CXTPPropertyGridView::InsertCategory(int nIndex, CString strCaption, CXTPPropertyGridItem* pCategory) { .....    pCategory->m_nFlags = xtpGridItemHasExpandButton; ... }   void CXTPPropertyGridPaintManager::DrawItem(PDRAWITEMSTRUCT lpDrawItemStruct) { ....    if (pItem->HasChilds() && pItem->GetFlags() & xtpGridItemHasExpandButton)    {       CRgn rgn;       if (!pItem->IsCategory())       {          rgn.CreateRectRgnIndirect(&rcCaption);          dc.SelectClipRgn(&rgn);       }       DrawExpandButton(dc, pItem, rcCaption);       dc.SelectClipRgn(NULL);     } } BOOL CXTPPropertyGridItem::OnLButtonDown(UINT, CPoint point) { ....    if(point.x >= nOffset && point.x <= XTP_PGI_EXPAND_BORDER + nOffset && m_nFlags & xtpGridItemHasExpandButton)    {       if(m_bExpanded) Collapse(); else Expand();    } AFX_INLINE void CXTPPropertyGridItem::SetFlags(UINT nFlags) { // ASSERT(!m_bCategory); ASSERT((nFlags & (xtpGridItemHasComboButton | xtpGridItemHasExpandButton)) != (xtpGridItemHasComboButton | xtpGridItemHasExpandButton)); m_nFlags = nFlags; }

Ali