求编译错误：：：identifier '__deref_opt_out' 怎么报答都行

>C:\Program Files\Windows Mobile 6 SDK\PocketPC\Include\Armv4i\phone.h(314) : error C2061: syntax error : identifier '__deref_opt_out'

不明白

将__deref_opt_out这个变量的定义发出来看看

BOOL PhoneIsEmergencyNumber(BOOL fTailMatchOnly, __in LPCTSTR pszNumber, __deref_opt_out LPCTSTR* ppszEmergencyNumber);

附加全文
#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <windows.h>

#ifdef WINCEOEM
#include <phonep.h>
#endif


typedef enum
{
  CALLERIDTYPE_UNAVAILABLE,
  CALLERIDTYPE_BLOCKED,
  CALLERIDTYPE_AVAILABLE
} CALLERIDTYPE;

typedef enum
{
  IOM_MISSED,
  IOM_INCOMING,
  IOM_OUTGOING
} IOM;

typedef enum
{ 
  CALLLOGSEEK_BEGINNING= 2,
  CALLLOGSEEK_END = 4
} CALLLOGSEEK;  

typedef struct
{
  DWORD cbSize; // sizeof CALLLOGENTRY
  FILETIME ftStartTime;
  FILETIME ftEndTime;
  IOM iom;
  BOOL fOutgoing:1; // direction of call. (Missed calls are incoming.)
  BOOL fConnected:1; // Did the call connect? (as opposed to busy, no answer)
  BOOL fEnded:1; // Was the call ended? (as opposed to dropped)
  BOOL fRoam:1; // Roaming (vs. local)
  CALLERIDTYPE cidt;
  PTSTR pszNumber;
  PTSTR pszName;
  PTSTR pszNameType; // "w" for work tel, "h" for home tel, for example
  PTSTR pszNote; // filename of associated Notes file
} CALLLOGENTRY, *PCALLLOGENTRY;

// Open the call log and set the seek pointer to the beginning.
HRESULT PhoneOpenCallLog (HANDLE *ph);

// PhoneGetCallLogEntry returns one call log entry and advances the seek 
// pointer.  
// pentry->cbSize must be set to "sizeof CALLLOGENTRY" before this function is 
// called.
// The entries are returned in order of start time, the most recent call first.
// It is the responsibility of the caller to LocalFree any strings 
// which are returned.
// A return value of S_FALSE indicates there are no more entries.
HRESULT PhoneGetCallLogEntry (HANDLE h, PCALLLOGENTRY pentry);

// PhoneSeekCallLog seeks to a record in the call log.  
// iRecord is the zero-based index of the record, starting at the beginning 
// if seek == CALLLOGSEEK_BEGINNING, at the end if CALLLOGSEEK_END.  
// piRecord returns the zero-based index (from the beginning) of the seek 
// pointer after the seek is performed.
// PhoneSeekCallLog(h, CALLLOGSEEK_END, 0, &count) will return the number of 
// records.
HRESULT PhoneSeekCallLog (HANDLE hdb, CALLLOGSEEK seek, DWORD iRecord, LPDWORD piRecord);

// Close the call log
HRESULT PhoneCloseCallLog (HANDLE h);


// The Call Log application supports the context menu extensibility mechanism.
// The Context name is "Phone" and the Class name is "Log".
// The IUnknown pointer passed to the context menu handler supports IPropertyBag,
// and the set of properties supported is as follows:
//
// property name: type: value:
// -------------- ----- ------
// PropSet BSTR "CallLog"
// Number BSTR the phone number of the other person on the call
// NumberType BSTR the type of phone number (e.g. "h" for home)
// Name BSTR person's name 
// Year I2 the year of the beginning time of the call
// Month I2 the month of the beginning time of the call
// Day I2 the day of the beginning time of the call
// Hour I2 the hour of the beginning time of the call  
// Minute I2 the minute of the beginning time of the call
// Second I2 the second of the beginning time of the call
// DayOfWeek I2 the day of the week of the beginning time of the call
// Duration UI4 the duration of the call in seconds
// CallerIDType UI4 a CALLERIDTYPE value (see above)
// Connected BOOL Did the call connect? (as opposed to busy, no answer)
// Ended BOOL Was the call ended? (as opposed to dropped)
// Outgoing BOOL Was the call outgoing? (Missed calls are incoming.)
// Roaming BOOL Roaming?
// IOM UI4 an IOM value (see above)







// PhoneShowCallLog
//
// Show the Call Log, and filter it

typedef enum
{
  CALLLOGFILTER_ALL_CALLS,
  CALLLOGFILTER_MISSED,
  CALLLOGFILTER_INCOMING,
  CALLLOGFILTER_OUTGOING
} CALLLOGFILTER;

HRESULT PhoneShowCallLog(CALLLOGFILTER iCallLogFilter);









//++++++
//
// PhoneMakeCall
//
// Dials a number

typedef struct tagPHONEMAKECALLINFO
{
  DWORD cbSize;
  DWORD dwFlags;
   
  //Params to tapiRequestMakeCall
  PCWSTR pszDestAddress;
  PCWSTR pszAppName;
  PCWSTR pszCalledParty;
  PCWSTR pszComment;

  // owner window for dialog box that appears when the PMCF_EDITBEFORECALLING flag is passed into PhoneMakeCall
  HWND hwndOwner;
} PHONEMAKECALLINFO, *PPHONEMAKECALLINFO;

// PhoneMakeCall flags
#define PMCF_DEFAULT 0x00000001
#define PMCF_PROMPTBEFORECALLING 0x00000002
#define PMCF_EDITBEFORECALLING 0x00000020

LONG PhoneMakeCall(PHONEMAKECALLINFO *ppmci);

//
// End PhoneMakeCall
//
//------




//++++++
//
// PhoneAddSpeedDial
//
// adds a speed dial entry
//
// dwFlags - currently unused, set to 0
//
// piKey - in/out: the key sequence which will invoke the speed dial. 
// currently an entry between 2 and 99 (inclusive) is valid. 
// the API will cause existing entries to be overwritten
//
// pszDisplayName - the non-empty display name for the speed dial
//
// pszTelNumber - the non-empty tel# to be dialed
//

HRESULT PhoneAddSpeedDial(DWORD dwFlags, DWORD* piKey, const TCHAR* pszDisplayName, const TCHAR* pszTelNumber);

//
// End PhoneAddSpeedDial
//
//------




//++++++
//
// PhoneSendDTMFStart
//
// Allows an application to begin sending a DTMF tone using the 
// current phone call.
//
// Parameters:
// chDTMF - DTMF character to send. Must be '0'-'9', 
// 'A'-'D', '*', or '#'.
//
// Return Value:
// -----------------------------------------------------------
// Value Description
// ------------------------------------------------------------
// S_OK The operation completed successfully.
// E_FAIL An unknown error occurred.
// E_INVALIDARG chDTMF is invalid.
// E_NOTIMPL No phone is present on the device, the 
// phone service is not running, or no 
// calls are currently active.
//  
// Other custom failure codes where the facility code is
// FACILITY_WINDOWS_CE may be retrieved using the HRESULT_CODE
// macro:
// -----------------------------------------------------------
// Error Code Description
// ------------------------------------------------------------
// ERROR_DEVICE_NOT_CONNECTED No phone is present on the device, 
// the phone service is not running, or 
// no calls are currently active.
//
// Remarks:
// Caller must call PhoneSendDTMFStop to stop the DTMF tone.
//
// This function will fail if no phone is present on the 
// device, the phone service is not running, or no calls are  
// currently active. If a subsequent call to this API is made 
// by the caller or any other application before the DTMF tone  
// is finished the original DTMF tone will cease and the new 
// DTMF will be sent.
//

HRESULT PhoneSendDTMFStart(TCHAR chDTMF);

//
// End PhoneSendDTMFStart
//
//------




//++++++
//
// PhoneSendDTMFStop
//
// Stops an existing DTMF tone.
//
// Remarks:
// This function stops all DTMF tones. Applications 
// may use PhoneSendDTMFStart to begin a DTMF tone.
//

void PhoneSendDTMFStop();

//
// End PhoneSendDTMFStop
//
//------


//++++++
//
// PhoneIsEmergencyNumber
//
// Determines if a string contains an emergency phone number.
//
// Parameters:
// fTailMatchOnly
// [in] If this argument is set to TRUE, the function only 
// attempts to match emergency numbers at the end of 
// pszNumber. If this value is FALSE, the function attempts 
// to match the emergency string with the full pszNumber 
/// argument exactly.
// pszNumber
// [in] String to match. If this pointer is NULL or points 
// to an empty string, the function returns FALSE.
// ppszEmergencyNumber
// [out] On success, constant pointer to the emergency phone 
// number matched in pszNumber. Caller must not free. On 
// failure, this pointer is undefined. Optional, may be NULL.
//
// Return Value:
// TRUE if pszNumber contains an emergency number; otherwise FALSE.
//
// Remarks:
// The system merges the list of emergency phone numbers from 
// the registry and the SIM, if available. The list of emergency 
// numbers can vary by device.
//

BOOL PhoneIsEmergencyNumber(BOOL fTailMatchOnly, __in LPCTSTR pszNumber, __deref_opt_out LPCTSTR* ppszEmergencyNumber);

//
// End PhoneIsEmergencyNumber
//
//------


#ifdef __cplusplus
}
#endif

BOOL PhoneIsEmergencyNumber(BOOL fTailMatchOnly, __in LPCTSTR pszNumber, __deref_opt_out LPCTSTR* ppszEmergencyNumber);

__deref_opt_out是一个宏吗？

这么长 一堆注释

没搜到个所以然：http://www.google.com.hk/search?q=error+C2061:+syntax+error+:+identifier+%27__deref_opt_out%27&hl=zh-CN&safe=strict&client=firefox-a&rls=org.mozilla:zh-CN:official&filter=0