L_WiaInitSession

#include "ltwia.h"

L_LTWIA_API L_INT EXT_FUNCTION L_WiaInitSession(uWiaVersion, phSession)

L_UINT uWiaVersion;

WIA version you wish to use

pHWIASESSION phSession;

pointer to a WIA session handle

Initializes the WIA session.

Parameter Description
uWiaVersion The WIA version to be used. Possible values are:
  Value Meaning
  WiaVersion1 [1] Use WIA version 1.
  WiaVersion2 [2] Use WIA version 2.
phSession Pointer to a WIA session handle. You should keep this handle handy since you are going to need it in almost all other WIA functions.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

This feature is available in version 16 or higher.

L_WiaInitSession should be called before calling any other LEADTOOLS WIA toolkit function. Likewise, when the handle to the WIA session is no longer needed, it should be freed by calling L_WiaEndSession. For every call to L_WiaInitSession there must be a call to L_WiaEndSession.

Call the L_WiaIsAvailable function to determine whether a WIA source is installed, and which version of WIA is being used.

Note: You do not need to call L_WiaInitSession if you are using the high-level L_WiaAcquireSimple function, since it handles session initialization, session end, and device selection automatically.

Required DLLs and Libraries

LTWIA

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

LEADTOOLS WIA supports both 32-bit and 64-bit image acquisition for both WIA 1.0 (XP and earlier) and WIA 2.0 (VISTA and later).

Help Version 19.0.2017.10.18
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