#include "ltdoc2.h"

L_LTDOC2_API L_INT L_Doc2SelectZoneExt(hDoc, hDC, nDocId, nPageIndex, nZoneIndex, bSelect)

Selects or deselects the specified zone in the specified page, and draws the results onto the specified device context L_HDOC2.


L_HDOC2 hDoc

Handle to the OCR document.


Handle to a device context, such as a screen, to use as the display surface. The mapping mode of the device context must be MM_TEXT.

L_INT nDocId

Document ID created by calling L_Doc2CreateDocument.

L_INT nPageIndex

Zero-based index of the page, which contains the zone.

L_INT nZoneIndex

Zero-based index of the zone that will be selected or deselected.

L_BOOL bSelect

Flag that determines the function behavior. Possible values are:

Value Meaning
TRUE Select the zone specified by the nZoneIndex parameter.
FALSE Deselect the zone specified by the nZoneIndex parameter.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


To draw a page, call the L_Doc2DrawPage / L_Doc2DrawPageExt function.

To select a zone by specifying a hit point, call the L_Doc2SelectZoneByPoint / L_Doc2SelectZoneByPointExt function.

Required DLLs and Libraries

Help Version 21.0.2021.4.7
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