// Microsoft Foundation Classes C++ library.
// Copyright (C) 1993 Microsoft Corporation,
// All rights reserved.

// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp and/or WinHelp documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#ifndef __AFXDB_H__
#define __AFXDB_H__

#ifndef __AFXWIN_H__
#include <afxext.h>
#endif

/////////////////////////////////////////////////////////////////////////////
// AFXDB - MFC SQL/ODBC/Database support

// Classes declared in this file

	//CException
		class CDBException;    // abnormal return value

	//CFieldExchange
		class CFieldExchange;   // Recordset Field Exchange

	//CObject
		class CDatabase;    // Connecting to databases
		class CRecordset;   // Data result sets

//CObject
	//CCmdTarget;
		//CWnd
			//CView
				//CScrollView
					//CFormView
						class CRecordView;     // view records with a form

// Non CObject classes
struct CRecordsetStatus;
struct CFieldInfo;

/////////////////////////////////////////////////////////////////////////////

// include standard SQL/ODBC "C" APIs
#include <sql.h>        // core
#include <sqlext.h>     // extensions

// ODBC helpers
// return code left in 'nRetCode'
#define AFX_SQL_ASYNC(prs, SQLFunc) do { ASSERT(!CDatabase::InWaitForDataSource()); \
	while ((nRetCode = (SQLFunc)) == SQL_STILL_EXECUTING) \
		prs->OnWaitForDataSource(TRUE); \
	prs->OnWaitForDataSource(FALSE); } while (0)

#define AFX_SQL_SYNC(SQLFunc)   do { ASSERT(!CDatabase::InWaitForDataSource()); \
	nRetCode = SQLFunc; } while (0)

// Max display length in chars of timestamp (date & time) value
#define TIMESTAMP_PRECISION 23

// AFXDLL support
#undef AFXAPP_DATA
#define AFXAPP_DATA AFXAPIEX_DATA

//  Miscellaneous sizing info
#define MAX_CURRENCY     30     // Max size of Currency($) string
#define MAX_TNAME_LEN    64     // Max size of table names
#define MAX_FNAME_LEN    64     // Max size of field names
#define MAX_DBNAME_LEN   32     // Max size of a database name
#define MAX_DNAME_LEN    256        // Max size of Recordset names
#define MAX_CONNECT_LEN  512        // Max size of Connect string
#define MAX_CURSOR_NAME  18     // Max size of a cursor name

// Max size for CString (incl. zero term.) and CByteArray
#define MAXINT 32767

// Timeout and net wait defaults
#define DEFAULT_LOGIN_TIMEOUT 15    // seconds to before fail on connect
#define DEFAULT_QUERY_TIMEOUT 15    // seconds to before fail waiting for results
#define DEFAULT_MAX_WAIT_FOR_DATASOURCE 250 // milliseconds. Give DATASOURCE 1/4 second to respond
#define DEFAULT_MIN_WAIT_FOR_DATASOURCE 50  // milliseconds. Start value for min wait heuristic


// Field Flags, used to indicate status of fields
#define AFX_SQL_FIELD_FLAG_DIRTY    0x1
#define AFX_SQL_FIELD_FLAG_NULL     0x2

/////////////////////////////////////////////////////////////////////////////
// CDBException - something gone wrong

// Dbkit extended error codes
#define AFX_SQL_ERROR                           1000
#define AFX_SQL_ERROR_CONNECT_FAIL              AFX_SQL_ERROR+1
#define AFX_SQL_ERROR_RECORDSET_FORWARD_ONLY    AFX_SQL_ERROR+2
#define AFX_SQL_ERROR_EMPTY_COLUMN_LIST         AFX_SQL_ERROR+3
#define AFX_SQL_ERROR_FIELD_SCHEMA_MISMATCH     AFX_SQL_ERROR+4
#define AFX_SQL_ERROR_ILLEGAL_MODE              AFX_SQL_ERROR+5
#define AFX_SQL_ERROR_MULTIPLE_ROWS_AFFECTED    AFX_SQL_ERROR+6
#define AFX_SQL_ERROR_NO_CURRENT_RECORD         AFX_SQL_ERROR+7
#define AFX_SQL_ERROR_NO_ROWS_AFFECTED          AFX_SQL_ERROR+8
#define AFX_SQL_ERROR_RECORDSET_READONLY        AFX_SQL_ERROR+9
#define AFX_SQL_ERROR_SQL_NO_TOTAL              AFX_SQL_ERROR+10
#define AFX_SQL_ERROR_ODBC_LOAD_FAILED          AFX_SQL_ERROR+11
#define AFX_SQL_ERROR_DYNASET_NOT_SUPPORTED     AFX_SQL_ERROR+12
#define AFX_SQL_ERROR_SNAPSHOT_NOT_SUPPORTED    AFX_SQL_ERROR+13
#define AFX_SQL_ERROR_API_CONFORMANCE           AFX_SQL_ERROR+14
#define AFX_SQL_ERROR_SQL_CONFORMANCE           AFX_SQL_ERROR+15
#define AFX_SQL_ERROR_NO_DATA_FOUND             AFX_SQL_ERROR+16
#define AFX_SQL_ERROR_ROW_UPDATE_NOT_SUPPORTED  AFX_SQL_ERROR+17
#define AFX_SQL_ERROR_ODBC_V2_REQUIRED          AFX_SQL_ERROR+18
#define AFX_SQL_ERROR_NO_POSITIONED_UPDATES     AFX_SQL_ERROR+19
#define AFX_SQL_ERROR_LOCK_MODE_NOT_SUPPORTED   AFX_SQL_ERROR+20
#define AFX_SQL_ERROR_DATA_TRUNCATED            AFX_SQL_ERROR+21
#define AFX_SQL_ERROR_ROW_FETCH                 AFX_SQL_ERROR+22
#define AFX_SQL_ERROR_MAX                       AFX_SQL_ERROR+23

class CDBException : public CException
{
	DECLARE_DYNAMIC(CDBException)

// Attributes
public:
	RETCODE m_nRetCode;
	CString m_strError;
	CString m_strStateNativeOrigin;

// Implementation (use AfxThrowDBException to create)
public:
	CDBException(RETCODE nRetCode = SQL_SUCCESS);

	void BuildErrorString(CDatabase* pdb, HSTMT hstmt);
	void Empty();
	virtual ~CDBException();

#ifdef _DEBUG
	virtual void AssertValid() const;
	void TraceErrorMessage(LPCTSTR szTrace) const;
#endif // _DEBUG
};

void AFXDLL_EXPORT AFXAPI AfxThrowDBException(RETCODE nRetCode, CDatabase* pdb,
	HSTMT hstmt);

//////////////////////////////////////////////////////////////////////////////
// CLongBinary - a Long (generally > 32k in length) Binary object

#define AFX_SQL_DEFAULT_LONGBINARY_SIZE 1024

class CLongBinary : public CObject
{
	DECLARE_DYNAMIC(CLongBinary)

// Constructors
public:
	CLongBinary();

// Attributes
	HGLOBAL m_hData;
	DWORD m_dwDataLength;

// Implementation
public:
	virtual ~CLongBinary();

#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif //_DEBUG
};

//////////////////////////////////////////////////////////////////////////////
// CDatabase - a SQL Database

class CDatabase : public CObject
{
	DECLARE_DYNAMIC(CDatabase)

// Constructors
public:
	CDatabase();

	virtual BOOL Open(LPCSTR lpszDSN, BOOL bExclusive = FALSE,
		BOOL bReadonly = FALSE, LPCSTR lpszConnect = "ODBC;");
	virtual void Close();

// Attributes
public:
	HDBC m_hdbc;

	BOOL IsOpen() const;        // Database successfully opened?
	BOOL CanUpdate() const;
	BOOL CanTransact() const;   // Are Transactions supported?

	CString GetDatabaseName() const;
	const CString& GetConnect() const;

	// global state - if waiting for datasource => not normal operations
	static BOOL PASCAL InWaitForDataSource();

// Operations
public:
	void SetLoginTimeout(DWORD dwSeconds);
	void SetQueryTimeout(DWORD dwSeconds);
	void SetSynchronousMode(BOOL bSynchronous);

	// transaction control
	BOOL BeginTrans();
	BOOL CommitTrans();
	BOOL Rollback();

	// direct sql execution
	BOOL ExecuteSQL(LPCSTR lpszSQL);

	// Cancel asynchronous operation
	void Cancel();

// Overridables
public:
	// set special options
	virtual void OnSetOptions(HSTMT hstmt);

	// Give user chance to cancel long operation
	virtual void OnWaitForDataSource(BOOL bStillExecuting);

// Implementation
public:
	virtual ~CDatabase();

#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;

	BOOL m_bTransactionPending;
#endif //_DEBUG

	// general error check
	virtual BOOL Check(RETCODE nRetCode) const;

	CString QuoteName(const char* szName);
	BOOL m_bStripTrailingSpaces;

protected:
	CString m_strConnect;

	int nRefCount;
	BOOL m_bUpdatable;
	BOOL m_bTransactions;
	DWORD m_dwLoginTimeout;
	HSTMT m_hstmt;
	DWORD m_dwWait;

	DWORD m_dwQueryTimeout;
	DWORD m_dwMinWaitForDataSource;
	DWORD m_dwMaxWaitForDataSource;
	BOOL m_bAsync;
	char m_chIDQuoteChar;

	void ThrowDBException(RETCODE nRetCode);
	void AllocConnect();
	void Free();

	// friend classes that call protected CDatabase overridables
	friend class CRecordset;
	friend class CFieldExchange;
	friend class CDBException;
};


//////////////////////////////// /////////////////////////////////////////////
// Recordset Field exchanged (RFX_)

#define AFX_RFX_INT_PSEUDO_NULL (0x7EE4)
#define AFX_RFX_LONG_PSEUDO_NULL (0x4a4d4120L)
#define AFX_RFX_BYTE_PSEUDO_NULL 255
#define AFX_RFX_SINGLE_PSEUDO_NULL (-9.123e19)
#define AFX_RFX_DOUBLE_PSEUDO_NULL (-9.123e19)
#define AFX_RFX_BOOL_PSEUDO_NULL 2
#define AFX_RFX_DATE_PSEUDO_NULL CTime(0)

#define AFX_RFX_BOOL        1
#define AFX_RFX_BYTE        2
#define AFX_RFX_INT     3
#define AFX_RFX_LONG        4
#define AFX_RFX_SINGLE      6
#define AFX_RFX_DOUBLE      7
#define AFX_RFX_DATE        8
#define AFX_RFX_BINARY      9
#define AFX_RFX_TEXT        10
#define AFX_RFX_LONGBINARY  11

// CFieldExchange - for field exchange
class AFX_CLASS_EXPORT AFX_STACK_DATA CFieldExchange
{
// Attributes
public:
	enum RFX_Operation
	{
		BindParam, // register users parameters with ODBC SQLSetParam
		BindFieldToColumn, // register users fields with ODBC SQLBindCol
		Fixup, // Set string lengths, clear status bits
		MarkForAddNew,
		MarkForUpdate,  // Prepare fields and flags for update operation
		Name, // append dirty field name
		NameValue, // append dirty name=value
		Value, // append dirty value or parameter marker
		SetFieldDirty, // Set status bit for changed status
		SetFieldNull,   // Set status bit for null value
		IsFieldDirty,// return TRUE if field is dirty
		IsFieldNull,// return TRUE if field is marked NULL
		IsFieldNullable,// return TRUE if field can hold NULL values
		StoreField, // archive values of current record
		LoadField,  // reload archived values into current record
		GetFieldInfoValue,  // general info on a field via pv for field
		GetFieldInfoOrdinal,    // general info on a field via field ordinal
		RebindDateParam, //  migrate date param values to proxy array before Requery
		MaxRFXOperation,
	};
	UINT m_nOperation;  // Type of exchange operation
	CRecordset* m_prs;  // recordset handle

// Operations
	enum FieldType
	{
		noFieldType,
		outputColumn,
		param,
	};

// Operations (for implementors of RFX procs)
	BOOL IsFieldType(UINT* pnField);

	// Indicate purpose of subsequent RFX calls
	void SetFieldType(UINT nFieldType);

// Implementation
	CFieldExchange(UINT nOperation, CRecordset* prs, void* pvField = NULL);

	void Default(const char *szName,
		void* pv, LONG* plLength, int nCType, UINT cbValue, UINT cbPrecision);

	int GetColumnType(int nColumn, UINT* pcbLength = NULL,
		int* pnScale = NULL, int* pnNullable = NULL);

	// Current type of field
	UINT m_nFieldType;

	// For GetFieldInfo
	CFieldInfo* m_pfi;  // GetFieldInfo return struct
	BOOL m_bFieldFound; // GetFieldInfo search successful?

	// For returning status info for a field
	BOOL m_bNull;       // return result of IsFieldNull(able)/Dirty operation
	BOOL m_bDirty;      // return result of IsFieldNull(able)/Dirty operation

	CString* m_pstr;    // Field name or destination for building various SQL clauses
	BOOL m_bField;      // Value to set for SetField operation
	void* m_pvField;    // For indicating an operation on a specific field
	CArchive* m_par;    // For storing/loading copy buffer
	LPCSTR m_lpszSeparator; // append after field names
	UINT m_nFields;     // count of fields for various operations
	UINT m_nParams;     // count of fields for various operations
	UINT m_nParamFields;    // count of fields for various operations
	HSTMT m_hstmt;      // For SQLSetParam on update statement
};

/////////////////////////////////////////////////////////////////////////////
// Standard RecordSet Field Exchange routines

// text data
void AFXDLL_EXPORT AFXAPI RFX_Text(CFieldExchange* pFX, const char *szName, CString& value,
	// Default max length for char and varchar, default datasource type
	int nMaxLength = 255, int nColumnType = SQL_VARCHAR);

// boolean data
void AFXDLL_EXPORT AFXAPI RFX_Bool(CFieldExchange* pFX, const char *szName, BOOL& value);

// integer data
void AFXDLL_EXPORT AFXAPI RFX_Long(CFieldExchange* pFX, const char *szName, long& value);
void AFXDLL_EXPORT AFXAPI RFX_Int(CFieldExchange* pFX, const char *szName, int& value);
void AFXDLL_EXPORT AFXAPI RFX_Single(CFieldExchange* pFX, const char *szName, float& value);
void AFXDLL_EXPORT AFXAPI RFX_Double(CFieldExchange* pFX, const char *szName, double& value);

// date and time
void AFXDLL_EXPORT AFXAPI RFX_Date(CFieldExchange* pFX, const char *szName, CTime& value);

// Binary data
void AFXDLL_EXPORT AFXAPI RFX_Binary(CFieldExchange* pFX, const char *szName, CByteArray& value,
	// Default max length is for binary and varbinary
	int nMaxLength = 255);
void AFXDLL_EXPORT AFXAPI RFX_Byte(CFieldExchange* pFX, const char *szName, BYTE& value);
void AFXDLL_EXPORT AFXAPI RFX_LongBinary(CFieldExchange* pFX, const char *szName, CLongBinary& value);


/////////////////////////////////////////////////////////////////////////////
// Database Dialog Data Exchange cover routines
// Cover routines provide database semantics on top of DDX routines

// simple text operations
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, BYTE& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, int& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, UINT& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, long& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, DWORD& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, CString& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, double& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, float& value, CRecordset* pRecordset);

// special control types
void AFXDLL_EXPORT AFXAPI DDX_FieldCheck(CDataExchange* pDX, int nIDC, int& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldRadio(CDataExchange* pDX, int nIDC, int& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldLBString(CDataExchange* pDX, int nIDC, CString& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldCBString(CDataExchange* pDX, int nIDC, CString& value, CRecordset* pRecordset);
#if (WINVER >= 0x030a)
void AFXDLL_EXPORT AFXAPI DDX_FieldLBStringExact(CDataExchange* pDX, int nIDC, CString& value, CRecordset* pRecordset);
void AFXDLL_EXPORT AFXAPI DDX_FieldCBStringExact(CDataExchange* pDX, int nIDC, CString& value, CRecordset* pRecordset);
#endif

//////////////////////////////////////////////////////////////////////////////
// CRecordset - the result of a SQL Statement

#define AFX_MOVE_FIRST      0x80000000L
#define AFX_MOVE_PREVIOUS   -1L
#define AFX_MOVE_REFRESH    0L
#define AFX_MOVE_NEXT       +1L
#define AFX_MOVE_LAST       0x7fffffffL

class CRecordset : public CObject
{
	DECLARE_DYNAMIC(CRecordset)

// Constructor
protected:
	CRecordset(CDatabase* pDatabase = NULL);

public:
	virtual ~CRecordset();

	enum OpenType
	{
		dynaset,
		snapshot,
		forwardOnly
	};

	enum OpenOptions
	{
		none =          0x0,
		readOnly =      0x0004,
		appendOnly =        0x0008,
		optimizeBulkAdd =	0x2000, // Use prepared HSTMT for multiple AddNews, dirty fields must not change.
		firstBulkAdd =		0x4000,	// INTERNAL to MFC, don't specify on Open.
	};
	virtual BOOL Open(UINT nOpenType = snapshot, LPCSTR lpszSQL = NULL, DWORD dwOptions = none);
	virtual void Close();

// Attributes
public:
	HSTMT m_hstmt;          // Source statement for this resultset
	CDatabase* m_pDatabase;       // Source database for this resultset

	CString m_strFilter;        // Where clause
	CString m_strSort;      // Order By Clause

	BOOL CanAppend() const;     // Can AddNew be called?
	BOOL CanRestart() const;    // Can Requery be called to restart a query?
	BOOL CanScroll() const;     // Can MovePrev and MoveFirst be called?
	BOOL CanTransact() const;   // Are Transactions supported?
	BOOL CanUpdate() const;     // Can Edit/AddNew/Delete be called?

	const CString& GetSQL() const;      // SQL executed for this recordset
	const CString& GetTableName() const;        // Table name

	BOOL IsOpen() const;        // Recordset successfully opened?
	BOOL IsBOF() const;     // Beginning Of File
	BOOL IsEOF() const;     // End Of File
	BOOL IsDeleted() const;     // On a deleted record

	BOOL IsFieldDirty(void *pv);    // has field been updated?
	BOOL IsFieldNull(void *pv); // is field NULL valued?
	BOOL IsFieldNullable(void *pv); // can field be set to a NULL value

	long GetRecordCount() const;        // Records seen so far or -1 if unknown
	void GetStatus(CRecordsetStatus& rStatus) const;

// Operations
public:
	// cursor operations
	void MoveNext();
	void MovePrev();
	void MoveFirst();
	void MoveLast();
	virtual void Move(long lRows);

	// edit buffer operations
	void AddNew();      // add new record at the end
	void Edit();        // start editing
	BOOL Update();      // update it
	void Delete();      // delete the current record

	// field operations
	void SetFieldDirty(void *pv, BOOL bDirty = TRUE);
	void SetFieldNull(void *pv, BOOL bNull = TRUE);

	// locking control during Edit
	enum LockMode
	{
		optimistic,
		pessimistic,
	};
	void SetLockingMode(UINT nMode);

	// Recordset operations
	virtual BOOL Requery();         // Re-execute query based on new params

	// Cancel asynchronous operation
	void Cancel();

// Overridables
public:
	// Get default connect string
	virtual CString GetDefaultConnect();

	// Get SQL to execute
	virtual CString GetDefaultSQL() = 0;

	// set special options
	virtual void OnSetOptions(HSTMT hstmt);

	// Give user chance to cancel long operation
	virtual void OnWaitForDataSource(BOOL bStillExecuting);

	// for recordset field exchange
	virtual void DoFieldExchange(CFieldExchange* pFX) = 0;

// Implementation
public:
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif //_DEBUG

	virtual BOOL Check(RETCODE nRetCode) const; // general error check
	void InitRecord();
	virtual void PreBindFields();   // called before data fields are bound
	UINT m_nFields;         // number of RFX fields
	UINT m_nParams;         // number of RFX params

	// RFX Operations on fields of CRecordset
	UINT BindParams(HSTMT hstmt);
	void RebindDateParams(HSTMT hstmt);
	UINT BindFieldsToColumns();
	void Fixups();
	UINT AppendNames(CString* pstr, LPCSTR szSeparator);
	UINT AppendValues(HSTMT hstmt, CString* pstr, LPCSTR szSeparator);
	UINT AppendNamesValues(HSTMT hstmt, CString* pstr, LPCSTR szSeparator);
	void StoreFields();
	void LoadFields();
	void MarkForAddNew();
	void MarkForUpdate();
	BOOL GetFieldInfo(void* pv, CFieldInfo* pfi);
	BOOL GetFieldInfo(UINT nField, CFieldInfo* pfi);

	// RFX operation helper functions
	BOOL UnboundFieldInfo(UINT nField, CFieldInfo* pfi);

	void ThrowDBException(RETCODE nRetCode, HSTMT hstmt = SQL_NULL_HSTMT);

	CMemFile* m_pmemfile;   // For saving copy buffer
	CArchive* m_par;    // For saving copy buffer

	void AllocFlags();
	BYTE GetFieldFlags(UINT nField, UINT nFieldType = CFieldExchange::outputColumn);
	void SetFieldFlags(UINT nField, BYTE bFlags, UINT nFieldType = CFieldExchange::outputColumn);
	void ClearFieldFlags(UINT nField, BYTE bFlags, UINT nFieldType = CFieldExchange::outputColumn);
	LONG* GetFieldLength(CFieldExchange* pFX);
	BOOL IsFieldFlagNull(UINT nField, UINT nFieldType);
	BOOL IsFieldFlagDirty(UINT nField, UINT nFieldType);
	void** m_pvFieldProxy;
	void** m_pvParamProxy;

protected:
	UINT m_nOpenType;
	enum EditMode
	{
		noMode,
		edit,
		addnew
	};
	UINT m_nEditMode;
	BOOL m_bEOFSeen;
	long m_lRecordCount;
	long m_lCurrentRecord;
	CString m_strCursorName;
	// Perform operation based on m_nEditMode
	BOOL UpdateInsertDelete();
	void ReleaseCopyBuffer();
	BOOL m_nLockMode;       // Control concurrency for Edit()
	HSTMT m_hstmtUpdate;
	BOOL m_bRecordsetDb;
public:
	DWORD m_dwOptions;	// Cache options specified on Open.
protected:
	BOOL m_bBOF;
	BOOL m_bEOF;
	BOOL m_bUpdatable;      // Is recordset updatable?
	BOOL m_bAppendable;
	CString m_strSQL;       // SQL statement for recordset
	CString m_strTableName;     // source table of recordset
	BOOL m_bScrollable; // supports MovePrev
	BOOL m_bDeleted;
	DWORD m_dwWait;
	UINT m_nFieldsBound;
	BYTE* m_pbFieldFlags;
	LONG* m_plFieldLength;
	BYTE* m_pbParamFlags;
	LONG* m_plParamLength;
	BOOL m_bExtendedFetch;
	void BuildTableQuery();

	friend class CFieldExchange;
	friend class CRecordView;
};

#define AFX_CURRENT_RECORD_UNDEFINED -2
#define AFX_CURRENT_RECORD_BOF -1

// For returning status for a recordset
struct AFX_CLASS_EXPORT CRecordsetStatus
{
	long m_lCurrentRecord;  // -2=Unknown,-1=BOF,0=1st record. . .
	BOOL m_bRecordCountFinal;// Have we counted all records?
};

// For returning field info on RFX fields
struct AFX_CLASS_EXPORT CFieldInfo
{
	// For ID'ing field
	UINT nField;        // Field number
	CString strName;    // Field name
	void* pv;       // Address of value for field

	// Return info GetFieldInfo
	UINT nDataType;     // data type of field (BOOL, BYTE, etc)
	DWORD dwSize;       // Max size for field data
};

/////////////////////////////////////////////////////////////////////////////
// CRecordView - form for viewing data records

class CRecordView : public CFormView
{
	DECLARE_DYNAMIC(CRecordView)
// Construction
protected:  // must derive your own class
	CRecordView(LPCSTR lpszTemplateName);
	CRecordView(UINT nIDTemplate);

// Attributes
public:
	virtual CRecordset* OnGetRecordset() = 0;

	BOOL IsOnLastRecord();
	BOOL IsOnFirstRecord();

// Operations
public:
	virtual BOOL OnMove(UINT nIDMoveCommand);

// Implementation
public:
	virtual ~CRecordView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif
	virtual void OnInitialUpdate();

protected:

	BOOL m_bOnFirstRecord;
	BOOL m_bOnLastRecord;

	//{{AFX_MSG(CRecordView)
	afx_msg void OnUpdateRecordFirst(CCmdUI* pCmdUI);
	afx_msg void OnUpdateRecordPrev(CCmdUI* pCmdUI);
	afx_msg void OnUpdateRecordNext(CCmdUI* pCmdUI);
	afx_msg void OnUpdateRecordLast(CCmdUI* pCmdUI);
	//}}AFX_MSG

	DECLARE_MESSAGE_MAP()
};

#undef AFXAPP_DATA
#define AFXAPP_DATA NEAR

/////////////////////////////////////////////////////////////////////////////
// Inline function declarations

#ifdef _AFX_ENABLE_INLINES
#define _AFXDBCORE_INLINE inline
#define _AFXDBRFX_INLINE inline
#define _AFXDBVIEW_INLINE inline
#include <afxdb.inl>
#undef _AFXDBVIEW_INLINE
#undef _AFXDBCORE_INLINE
#undef _AFXDBRFX_INLINE
#endif

//////////////////////////////////////////////////////////////////////////////
#endif //__AFXDB_H__
