LWIAENUMDEVICESCALLBACK

HWIASESSION hSession;

handle to an existing WIA session

pLWIADEVICEID pDeviceID;

pointer to a structure that contains information about found device

L_VOID * pUserData;

pointer to additional parameters

Parameter

Description

hSession

Handle to an existing WIA session. This handle is obtained by calling the L_WiaInitSession function.

pDeviceID

Pointer to a structure that contains information about each device found on the user machine.

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_WiaEnumDevices.)

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

SUCCESS

The function was successful.

ERROR_USER_ABORT

The callback wants to abort the device enumeration process.

< 1

An error occurred. Refer to Return Codes.

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.