LTWAINFINDFASTCONFIG

#include "lttwn.h"

L_INT pEXT_CALLBACK YourFunction(hSession, pResConfig, pUserData)

HTWAINSESSION hSession;

handle to an existing TWAIN session

pFASTCONFIG pResConfig;

pointer to a FASTCONFIG structure

L_VOID *pUserData;

pointer to additional parameters

Called for each configuration test. The address of this callback is passed as an argument to L_TwainFindFastConfig.

Parameter

Description

hSession

Handle to an existing TWAIN session. This handle is obtained by calling the L_TwainInitSession or L_TwainInitSession2 function.

pResConfig

Pointer to a FASTCONFIG structure that contains the scan configuration that is currently being tested.

pUserData

A void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of L_TwainFindFastConfig.)

 

Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.

Returns

SUCCESS

The function was successful.

SUCCESS_ABORT

Abort the testing configuration.

Comments

If you return SUCCESS, then the scan configuration testing process will be continued, otherwise, the process will be stopped.

Required DLLs and Libraries

LTTWN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files to be Included with your Application.

Help Version 19.0.2017.10.19
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