LWia::EnumFormatsCallBack

Summary

Called for each enumerated capability of the WIA device, and also allows the enumeration process to be aborted. Be sure to enable the callback functions beforehand by calling LBase::EnableCallBack (TRUE).

Syntax

#include "ltwrappr.h"

virtual L_INT LWia::EnumFormatsCallBack(nFormatsCount, nTransferMode, pFormat)

Parameters

L_INT nFormatsCount

The count of the enumerated WIA device formats.

L_INT nTransferMode

The transfer mode for the received enumerated format.

GUID * pFormat

Pointer to a GUID structure containing the received enumerated format.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This feature is available in LEADTOOLS version 16 or higher.

Call this function to provide the user with information about the available transfer formats of the selected WIA device. It can also be called to abort the enumeration process.

Required DLLs and Libraries

• 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.

See Also

Functions

• LWia::EnumFormats
• LWia::InitSession
• LWia::EndSession
• Class Members

Topics

• WIA Functionality: Property Functions
• WIA Functionality: Callbacks

Example

For an example, refer to LWia::EnumFormats.