Hi all,

i've experienced some problems with PropertyGrid, more precisely i get an exception from the debugger when trying to call Remove from a PropertygridItem object... i looked at the samples and the same code has no problem there... is there any precaution i should take before removing items in a propertygrid ? thanks

Hello, roberto

Hmm... may be you can sent backtrace log to see?

Hi,

Using DCRT libraries and performing some memory checks

(     // Turn on the full heap checking
    _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF       |
                      _CRTDBG_CHECK_ALWAYS_DF    |
                      _CRTDBG_DELAY_FREE_MEM_DF  |
                      _CRTDBG_LEAK_CHECK_DF       ) ;

, i realized that the problem comes when allocating a propertygriditem :

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{

  // gas tt
 ASSERT ( _CrtCheckMemory ( ) ) ;

 // ********************* Main Frame
 if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
 {
  TRACE("Failed to create FrameWindow\r\n");
  return -1;
 }
 m_PropertyGrid.Create( CRect(0,0,0,0), AfxGetMainWnd(), 0);
 CXTPPropertyGridItem* pFisse = m_PropertyGrid.AddCategory(_T("cat"));
  // gas tt
 ASSERT ( _CrtCheckMemory ( ) ) ;  <---- everything ok at this point

 CXTPPropertyGridItem* child = new CXTPPropertyGridItem(_T("key"),_T("val")); <-- _CrtCheckMemory ( ) complains here !!
 pFisse->AddChildItem(child);
 child->Remove();

Any idea about what causes this problem?

thanx in advance

All seems ok... one thing can be problem.

try to replace

 m_PropertyGrid.Create( CRect(0,0,0,0), AfxGetMainWnd(), 0);

to

 m_PropertyGrid.Create( CRect(0,0,0,0), this, 0);

because AfxGetMainWnd() will return NULL in CMainFrame::OnCreate..

May be you can isolate the problem with new sample and attach it here?

i realized what the problem was ...

on project properties there was a non standard option checked:

in c++ / code generation / struct member alignment - there was 1 byte (zp1) instead of Default..

i lost three days around that trivial thing, damn...

thank you guys anyway for your suggestions...