THREADENTRY32

Describes an entry from a list that enumerates the threads executing in the system when a snapshot was taken.

typedef struct tagTHREADENTRY32{ 
    DWORD  dwSize; 
    DWORD  cntUsage; 
    DWORD  th32ThreadID; 
    DWORD  th32OwnerProcessID; 
    LONG   tpBasePri; 
    LONG   tpDeltaPri; 
    DWORD  dwFlags; 
} THREADENTRY32; 
typedef THREADENTRY32 *  PTHREADENTRY32; 
typedef THREADENTRY32 *  LPTHREADENTRY32; 
 

Members

dwSize

Specifies the length, in bytes, of the structure. Before calling the Thread32First function, set this member to sizeof(THREADENTRY32). If you do not initialize dwSize, Thread32First will fail.

cntUsage

Number of references to the thread. A thread exists as long as its usage count is nonzero. As soon as its usage count becomes zero, a thread terminates.

th32ThreadID

Identifier of the thread. This identifier is compatible with the thread identifier returned by the CreateProcess function.

th32OwnerProcessID

Identifier of the process that created the thread. The contents of this member can be used by Win32 API elements.

tpBasePri

Initial priority level assigned to a thread. This member can be one of the following values:

Value	Meaning
THREAD_PRIORITY_IDLE	Indicates a base priority level of 1 for IDLE_PRIORITY_CLASS, NORMAL_PRIORITY_CLASS, or HIGH_PRIORITY_CLASS processes, and a base priority level of 16 for REALTIME_PRIORITY_CLASS processes.
THREAD_PRIORITY_LOWEST	Indicates 2 points below normal priority for the priority class.
THREAD_PRIORITY_BELOW_NORMAL	Indicates 1 point below normal priority for the priority class.
THREAD_PRIORITY_NORMAL	Indicates normal priority for the priority class.
THREAD_PRIORITY_ABOVE_ NORMAL	Indicates 1 point above normal priority for the priority class.
THREAD_PRIORITY_HIGHEST	Indicates 2 points above normal priority for the priority class.
THREAD_PRIORITY_TIME_ CRITICAL	Indicates a base priority level of 15 for IDLE_PRIORITY_CLASS, NORMAL_PRIORITY_CLASS, or HIGH_PRIORITY_CLASS processes, and a base priority level of 31 for REALTIME_PRIORITY_CLASS processes.

tpDeltaPri

Change in the priority level of a thread. This value is a signed delta from the base priority level assigned to the thread.

dwFlags

Reserved; do not use.

QuickInfo

  Windows NT: Requires version 5.0 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in tlhelp32.h.

See Also

Tool Help Library Overview, Tool Help Structures