ImageGear Professional DLL v18.1 for Windows
MED_ElemList_move_first
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ImageGear Professional v18.1 > API Reference Guide > MD Component API Reference > MD Component Functions Reference > Data Set Element List Functions > MED_ElemList_move_first

Glossary Item Box

This function makes the first Data Element in the specified level the Current Data Element.

Declaration:

  Copy Code 
AT_ERRCOUNT ACCUAPI MED_ElemList_move_first(
        HIGMEDELEMLIST hIGMedElemList, 
        AT_MODE level_op
);

Arguments:

Name Type Description
hIGMedElemList HIGMEDELEMLIST HIGMEDELEMLIST handle to the Data Element List object.
level_op AT_MODE

A variable of type AT_MODE that tells the function how to move when it comes to an SQ. SQs are like indented outline items, allowing for hierarchies of Data Elements. Set this to one of the following constants:

  • MED_DCM_MOVE_LEVEL_FIXED: This setting tells the function to move only within the same level as the previous Current DE. An SQ and all its Data Elements are skipped over. If you are in a SQ, you can only move about the SQ.
  • MED_DCM_MOVE_LEVEL_FLOAT: This setting tells the function to move up or down as needed to get to the next DE. If the next DE is an SQ the Current DE moves down into it. At the end of the SQ, the Current DE will move back out to the lower levels (for example, from Level 2 to Level 1).

Return Value:

Returns the number of ImageGear errors that occurred during the function call.

Supported Raster Image Formats:

This function does not process image pixels.

Remarks:

This function also returns the DE's VR (Value Representation), the number of bytes in the Tag's data, and the Item Count.

Which level of the Element List will be considered depends upon the setting of level_op.

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