LWIAENUMITEMSCALLBACK

HWIASESSION hSession;

handle to an existing WIA session

L_INT nItemsCount;

enumerated items count

L_VOID * pItem;

pointer to IWiaItem or IWiaItem2 interfaces

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.

nItemsCount

Enumerated items count.

pItem

Void pointer to IWiaItem or IWiaItem2 interface (the IWiaItem object if using WIA Version 1.0; the IWiaItem2 object if using WIA Version 2.0).

Cast this pointer back to IWiaItem* (when using WIA version 1) or IWiaItem2* (when using WIA version 2).

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_WiaEnumChildItems.)

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 child items 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.