Leaked source code of windows server 2003
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/****************************************************************************
*
* (C) COPYRIGHT 1998-2001, MICROSOFT CORP.
*
* FILE: wiatwcmp.h
*
* VERSION: 1.0
*
* DATE: 6/01/2001
*
* DESCRIPTION:
* Defines TWAIN Compatibility Layer - Capability pass-through constants.
* To support existing TWAIN applications that have private capabilities,
* WIA drivers can utilize the Pass-through functionality.
*
*****************************************************************************/
#ifndef _WIATWCMP_H_
#define _WIATWCMP_H_
#define WiaItemTypeTwainCapabilityPassThrough 0x00020000
//**************************************************************************
//
// TWAIN capability pass-through
//
//**************************************************************************
//
// Escape code ranges 2001 - 3000 are reserved for future ESC_ commands
//
#define ESC_TWAIN_CAPABILITY 2001 // private TWAIN capability negotiation
#define ESC_TWAIN_PRIVATE_SUPPORTED_CAPS 2002 // query for supported private capabilities
typedef struct _TWAIN_CAPABILITY {
LONG lSize; // size of TWAIN_CAPABILITY structure
LONG lMSG; // TWAIN Message, MSG_GET, MSG_GETCURRENT, MSG_SET, etc..
LONG lCapID; // id of capability to set or get
LONG lConType; // container type of capability
LONG lRC; // TWAIN return code, TWRC_SUCCESS, TWRC_FAILURE, etc..
LONG lCC; // TWAIN condition code, TWCC_SUCCESS, TWCC_BUMMER, etc..
LONG lDataSize;// data size
BYTE Data[1]; // first BYTE of data
}TWAIN_CAPABILITY,*PTWAIN_CAPABILITY;
#endif