/****** Module list walking **************************************************/

typedef struct tagMODULEENTRY
{
    DWORD dwSize;
    char szModule[MAX_MODULE_NAME + 1];
    HMODULE hModule;
    WORD wcUsage;
    char szExePath[MAX_PATH16 + 1];
    WORD wNext;
} MODULEENTRY;

BOOL    WINAPI ModuleFirst(MODULEENTRY FAR* lpModule);
BOOL    WINAPI ModuleNext(MODULEENTRY FAR* lpModule);
HMODULE WINAPI ModuleFindName(MODULEENTRY FAR* lpModule, LPCSTR lpstrName);
HMODULE WINAPI ModuleFindHandle(MODULEENTRY FAR* lpModule, HMODULE hModule);

/****** Task list walking *****************************************************/

typedef struct tagTASKENTRY
{
    DWORD dwSize;
    HTASK hTask;
    HTASK hTaskParent;
    HINSTANCE hInst;
    HMODULE hModule;
    WORD wSS;
    WORD wSP;
    WORD wStackTop;
    WORD wStackMinimum;
    WORD wStackBottom;
    WORD wcEvents;
    HGLOBAL hQueue;
    char szModule[MAX_MODULE_NAME + 1];
    WORD wPSPOffset;
    HANDLE hNext;
} TASKENTRY;

BOOL    WINAPI TaskFirst(TASKENTRY FAR* lpTask);
BOOL    WINAPI TaskNext(TASKENTRY FAR* lpTask);
BOOL    WINAPI TaskFindHandle(TASKENTRY FAR* lpTask, HTASK hTask);
DWORD   WINAPI TaskSetCSIP(HTASK hTask, WORD wCS, WORD wIP);
DWORD   WINAPI TaskGetCSIP(HTASK hTask);
BOOL    WINAPI TaskSwitch(HTASK hTask, DWORD dwNewCSIP);

/****** Window Class enumeration **********************************************/

typedef struct tagCLASSENTRY
{
    DWORD dwSize;
    HMODULE hInst;              /* This is really an hModule */
    char szClassName[MAX_CLASSNAME + 1];
    WORD wNext;
} CLASSENTRY;

BOOL    WINAPI ClassFirst(CLASSENTRY FAR* lpClass);
BOOL    WINAPI ClassNext(CLASSENTRY FAR* lpClass);

/****** Information functions *************************************************/

typedef struct tagMEMMANINFO
{
    DWORD dwSize;
    DWORD dwLargestFreeBlock;
    DWORD dwMaxPagesAvailable;
    DWORD dwMaxPagesLockable;
    DWORD dwTotalLinearSpace;
    DWORD dwTotalUnlockedPages;
    DWORD dwFreePages;
    DWORD dwTotalPages;
    DWORD dwFreeLinearSpace;
    DWORD dwSwapFilePages;
    WORD wPageSize;
} MEMMANINFO;

BOOL    WINAPI MemManInfo(MEMMANINFO FAR* lpEnhMode);

typedef struct tagSYSHEAPINFO
{
    DWORD dwSize;
    WORD wUserFreePercent;
    WORD wGDIFreePercent;
    HGLOBAL hUserSegment;
    HGLOBAL hGDISegment;
    HGLOBAL hWndSegment;
    HGLOBAL hMenuSegment;
    HGLOBAL hGDI32Segment;
} SYSHEAPINFO;

BOOL    WINAPI SystemHeapInfo(SYSHEAPINFO FAR* lpSysHeap);

/****** Interrupt Handling ****************************************************/

/* Hooked interrupts */
#define INT_DIV0            0
#define INT_1               1
#define INT_3               3
#define INT_UDINSTR         6
#define INT_STKFAULT        12
#define INT_GPFAULT         13
#define INT_BADPAGEFAULT    14
#define INT_CTLALTSYSRQ     256

/* TOOLHELP Interrupt callbacks registered with InterruptRegister should
 *  always be written in assembly language.  The stack frame is not 
 *  compatible with high level language conventions.
 *
 *  This stack frame looks as follows to the callback.  All registers
 *  should be preserved across this callback to allow restarting fault.
 *               ------------
 *               |   Flags  |  [SP + 0Eh]
 *               |    CS    |  [SP + 0Ch]
 *               |    IP    |  [SP + 0Ah]
 *               |  Handle  |  [SP + 08h]
 *               |Exception#|  [SP + 06h]
 *               |    AX    |  [SP + 04h]  AX Saved to allow MakeProcInstance
 *               |  Ret CS  |  [SP + 02h]
 *       SP--->  |  Ret IP  |  [SP + 00h]
 *               ------------
 */
BOOL    WINAPI InterruptRegister(HTASK hTask, FARPROC lpfnIntCallback);
BOOL    WINAPI InterruptUnRegister(HTASK hTask);

/*  Notifications:
 *      When a notification callback is called, two parameters are passed
 *      in:  a WORD, wID, and another DWORD, dwData.  wID is one of
 *      the values NFY_* below.  Callback routines should ignore unrecog-
 *      nized values to preserve future compatibility.  Callback routines
 *      are also passed a dwData value.  This may contain data or may be
 *      a FAR pointer to a structure, or may not be used depending on
 *      which notification is being received.
 *
 *      In all cases, if the return value of the callback is TRUE, the
 *      notification will NOT be passed on to other callbacks.  It has
 *      been handled.  This should be used sparingly and only with certain
 *      notifications.  Callbacks almost always return FALSE.
 */

/* NFY_UNKNOWN:  An unknown notification has been returned from KERNEL.  Apps
 *  should ignore these.
 */
#define NFY_UNKNOWN         0

/* NFY_LOADSEG:  dwData points to a NFYLOADSEG structure */
#define NFY_LOADSEG         1
typedef struct tagNFYLOADSEG
{
    DWORD dwSize;
    WORD wSelector;
    WORD wSegNum;
    WORD wType;             /* Low bit set if data seg, clear if code seg */
    WORD wcInstance;        /* Instance count ONLY VALID FOR DATA SEG */
    LPCSTR lpstrModuleName;
} NFYLOADSEG;

/* NFY_FREESEG:  LOWORD(dwData) is the selector of the segment being freed */
#define NFY_FREESEG         2

/* NFY_STARTDLL:  dwData points to a NFYLOADSEG structure */
#define NFY_STARTDLL        3
typedef struct tagNFYSTARTDLL
{
    DWORD dwSize;
    HMODULE hModule;
    WORD wCS;
    WORD wIP;
} NFYSTARTDLL;

/* NFY_STARTTASK:  dwData is the CS:IP of the start address of the task */
#define NFY_STARTTASK       4

/* NFY_EXITTASK:  The low byte of dwData contains the program exit code */
#define NFY_EXITTASK        5

/* NFY_DELMODULE:  LOWORD(dwData) is the handle of the module to be freed */
#define NFY_DELMODULE       6

/* NFY_RIP:  dwData points to a NFYRIP structure */
#define NFY_RIP             7
typedef struct tagNFYRIP
{
    DWORD dwSize;
    WORD wIP;
    WORD wCS;
    WORD wSS;
    WORD wBP;
    WORD wExitCode;
} NFYRIP;

/* NFY_TASKIN:  No data.  Callback should do GetCurrentTask() */
#define NFY_TASKIN          8

/* NFY_TASKOUT:  No data.  Callback should do GetCurrentTask() */
#define NFY_TASKOUT         9

/* NFY_INCHAR:  Return value from callback is used.  If NULL, mapped to 'i' */
#define NFY_INCHAR          10

/* NFY_OUTSTR:  dwData points to the string to be displayed */
#define NFY_OUTSTR          11

/* NFY_LOGERROR:  dwData points to a NFYLOGERROR struct */
#define NFY_LOGERROR        12
typedef struct tagNFYLOGERROR
{
    DWORD dwSize;
    UINT wErrCode;
    void FAR* lpInfo;       /* Error code-dependent */
} NFYLOGERROR;

/* NFY_LOGPARAMERROR:  dwData points to a NFYLOGPARAMERROR struct */
#define NFY_LOGPARAMERROR   13
typedef struct tagNFYLOGPARAMERROR
{
    DWORD dwSize;
    UINT wErrCode;
    FARPROC lpfnErrorAddr;
    void FAR* FAR* lpBadParam;
} NFYLOGPARAMERROR;

/* NotifyRegister() flags */
#define NF_NORMAL       0
#define NF_TASKSWITCH   1
#define NF_RIP          2

typedef BOOL (CALLBACK* LPFNNOTIFYCALLBACK)(WORD wID, DWORD dwData);

BOOL    WINAPI NotifyRegister(HTASK hTask, LPFNNOTIFYCALLBACK lpfn, WORD wFlags);
BOOL    WINAPI NotifyUnRegister(HTASK hTask);

/****** Miscellaneous *********************************************************/

void    WINAPI TerminateApp(HTASK hTask, WORD wFlags);

/* TerminateApp() flag values */
#define UAE_BOX     0
#define NO_UAE_BOX  1

DWORD   WINAPI MemoryRead(WORD wSel, DWORD dwOffset, void FAR* lpBuffer, DWORD dwcb);
DWORD   WINAPI MemoryWrite(WORD wSel, DWORD dwOffset, void FAR* lpBuffer, DWORD dwcb);

typedef struct tagTIMERINFO
{
    DWORD dwSize;
    DWORD dwmsSinceStart;
    DWORD dwmsThisVM;
} TIMERINFO;

BOOL    WINAPI TimerCount(TIMERINFO FAR* lpTimer);

#ifdef __cplusplus
}
#endif	/* __cplusplus */

#ifndef RC_INVOKED
#pragma pack()          /* Revert to default packing */
#endif

#endif /* !_INC_TOOLHELP */