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L_DicomGetFirstKey

Summary

Returns a pointer to the first item in the Dicom Dir Data Set.

Syntax

#include "ltdic.h"

L_LTDIC_API pDICOMELEMENT L_DicomGetFirstKey(hDS, pElement, bTree)

Parameters

pDICOMELEMENT pElement

Pointer to a DICOMELEMENT structure within the Data Set. A pointer to the DICOMELEMENT structure that contains the first item in the Data Set will be returned.

L_BOOL bTree

Flag that indicates how the Data Set will be evaluated. Possible values are:

Value	Meaning
TRUE	Evaluate the Data Set as a tree.
FALSE	Evaluate the Data Set as a list.

Returns

Value	Meaning
!NULL	A pointer to a DICOMELEMENT structure that contains the first item in the Data Set.
NULL	The Data Set is empty.

Comments

If the Data Set is evaluated as a tree structure, this function returns the first item on the same level as pElement with the same parent as pElement. Please note that the numbering of the items in this first illustration is arbitrary and does not imply order.

$image\GetFstTr.gif$

If the passed pointer points to	The function returns a pointer to
Item 1	Item 2
Item 3	Item 4
Item 5	Item 5
Item 6	Item 7
NULL	Item 2

If the Data Set is evaluated as a list, the first item in the list is returned. Please note that the numbering of the items in this illustration does indicate the order of the items when the Data Set is evaluated as a list.

$image\GetFtLst.gif$