CList::GetHeadPosition

  • 项目

POSITIONGetHeadPosition()const;

Return Value

A POSITION value that can be used for iteration or object pointer retrieval; NULL if the list is empty.

Remarks

Gets the position of the head element of this list.

Example

// Define myList.
CList<CString,CString&> myList;

// Add an element to the front of the list.
myList.AddHead(CString("ABC"));

// Verify the element at the head position
// is the one added.
POSITION pos = myList.GetHeadPosition();
ASSERT(CString("ABC") == myList.GetAt(pos));

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See Also   CList::GetTailPosition