C / C++ / MFC

#include <io.h>
 
inline bool dir_exists(const char* str)
{
  return _access(str,0)==0;
}

bool DoesDirectoryExist(LPCTSTR inputPath)
{
  bool bRet = false;
  DWORD dwRc = ::GetFileAttributes(inputPath);

  if (dwRc == 0xFFFFFFFF)
  {
    // Directory does not exist.
    bRet = false;
  } else if(dwRc & FILE_ATTRIBUTE_DIRECTORY)
  {
    bRet = true;
  } else
  {
    // File exists, but is not a directory
    bRet = false;
  }

  return bRet;
}

HTREEITEM hItem = GetRootItem();

while(hItem)
{
   // do some thing
   hItem = GetNextTreeItem(hItem);
}


HTREEITEM C3StateTree::GetNextItem(HTREEITEM hItem)
{
   HTREEITEM hti = NULL;

   // if there's a child, return the child
   if (ItemHasChildren(hItem))
	  hti = GetChildItem(hItem);

   if (hti == NULL)
   {
	   // no child, return sibling
	  while ((hti = GetNextSiblingItem(hItem)) == NULL)
	  {
		 // move up a level 	
	     if ((hItem = GetParentItem(hItem)) == NULL)
			return NULL;
	  }
   }
   return hti;
}