GetThreadContext

The GetThreadContext function retrieves the context of the specified thread.

BOOL GetThreadContext(
  HANDLE hThread,       // handle to thread with context
  LPCONTEXT lpContext   // context structure
);

Parameters

hThread

[in] Handle to the thread whose context is to be retrieved.

Windows NT/ 2000: The handle must have THREAD_GET_CONTEXT access to the thread. For more information, see Thread Security and Access Rights.

lpContext

[in/out] Pointer to the CONTEXT structure that receives the appropriate context of the specified thread. The value of the ContextFlags member of this structure specifies which portions of a thread's context are retrieved. The CONTEXT structure is highly computer specific. Currently, there are CONTEXT structures defined for Intel, MIPS, Alpha, and PowerPC processors. Refer to the WinNt.h header file for definitions of these structures.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The GetThreadContext function is used to retrieve the context of the specified thread. The function allows a selective context to be retrieved based on the value of the ContextFlags member of the CONTEXT structure. The thread handle identified by the hThread parameter is typically being debugged, but the function can also operate when it is not being debugged.

You cannot get a valid context for a running thread. Use the SuspendThread function to suspend the thread before calling GetThreadContext.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Winbase.h; include Windows.h.
  Library: Use Kernel32.lib.

See Also

Debugging Overview, Debugging Functions, CONTEXT, SetThreadContext, SuspendThread