C / C++ / MFC

long FileSystem::createDir
  (CString strDirectory)  // directory
{
  // Return if directory already exists
  if (dirExists (strDirectory))
     return (Status::Duplicate);
 
  // First create parent directory - return if unable
  CString strDirParent;
  getParentDir (strDirectory, strDirParent);
  if (!strDirParent.IsEmpty() && !dirExists (strDirParent))
     {
       long nStatus = createDir (strDirParent);
       if (nStatus == FileSystem::Status::Error)
          return (nStatus);
     }
 
  // Then create directory
  DWORD dwStatus = ::CreateDirectory (strDirectory, NULL);
  if (dwStatus == 0)
     return (Status::Error);
  return (Status::Success);
}

m_pToolTip.Create(this, TTS_BALLOON);

#ifndef TTS_BALLOON
#define TTS_BALLOON 64
#endif 

int arrIndex;  //this should hold the index of the object
.
.
//inserting the object number [arrIndex] into the tree
CMyObject * pMyObj = (CMyObject *)objArr.GetAt(arrIndex);
HTREEITEM hItem = m_tTreeCtrl.InsertItem(pMyObj->GetVersionLabel());
//now we set the item's data
//BTW, DWORD is a #define for usigned int
m_tTreeCtrl.SetItemData(hItem, (DWORD)arrIndex);
//now the data is set
//next is how to retreive it
.
.
CMyObject * pMyObj;
//where hItem is the handle of the tree item
int index = (int)m_tTreeCtrl.SetItemData(hItem);
pMyObj = (CMyObject *)objArr.GetAt(index);

m_tTreeCtrl.SetItemData(hItem, (DWORD)pMyObj);

pMyObj = (CMyObject *)objArr.m_tTreeCtrl.SetItemData(hItem);