GetThreadId function (processthreadsapi.h)
Retrieves the thread identifier of the specified thread.
Syntax
DWORD GetThreadId(
[in] HANDLE Thread
);
Parameters
[in] 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
| Requirement | Value |
|---|---|
| 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.h on Windows Vista, Windows 7, Windows Server 2008 Windows Server 2008 R2) |
| Library | Kernel32.lib |
| DLL | Kernel32.dll |