GetThreadId function

Retrieves the thread identifier of the specified thread.

Syntax

DWORD GetThreadId(
  HANDLE Thread
);

Parameters

Thread

A handle to the thread. The handle must have the THREAD_QUERY_INFORMATION or THREAD_QUERY_LIMITED_INFORMATION access right. For more information about access rights, see Thread Security and Access Rights.

Windows Server 2003:  The handle must have the THREAD_QUERY_INFORMATION access right.

Return Value

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

Remarks

Until a thread terminates, its thread identifier uniquely identifies it on the system.

To compile an application that uses this function, define _WIN32_WINNT as 0x0502 or later. For more information, see Using the Windows Headers.

Requirements

   
Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2003 [desktop apps | UWP apps]
Target Platform Windows
Header processthreadsapi.h (include Windows Vista, Windows 7, Windows Server 2008 Windows Server 2008 R2, Windows.h)
Library Kernel32.lib
DLL Kernel32.dll

See Also

GetCurrentThreadId

GetProcessId

GetProcessIdOfThread

Process and Thread Functions

Threads