LTWAINFINDFASTCONFIG

#include "lttwn.h"

L_INT pEXT_CALLBACK YourFunction(hSession, pResConfig, pUserData)

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

Parameters

HTWAINSESSION hSession

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

pFASTCONFIG pResConfig

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

L_VOID *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

Value Meaning
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

Help Version 21.0.2021.4.7
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