LTWAINFINDFASTCONFIG

Summary

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

Syntax

L_INT pEXT_CALLBACK YourFunction(hSession, pResConfig, pUserData)

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

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.

See Also

Functions

• L_TwainAcquire
• L_TwainAcquireList
• L_TwainInitSession
• L_TwainEndSession
• L_TwainOpenTemplateFile
• L_TwainCloseTemplateFile
• L_TwainTemplateDlg
• L_TwainAddCapabilityToFile
• L_TwainGetNumofCapsInFile
• L_TwainGetCapabilityFromFile
• L_TwainAcquireMulti
• L_TwainFindFastConfig
• L_TwainGetScanConfigs
• L_TwainFreeScanConfig
• L_TwainFastAcquire

Topics

• Scan Configurations
• TWAIN Functionality: Scan Configuration Functions

Example

For an example, refer to L_TwainFindFastConfig.