The GetWindowThreadProcessId function retrieves the identifier of the thread that created the specified window and, optionally, the identifier of the process that created the window.
Syntax
DWORD GetWindowThreadProcessId(
HWND hWnd,
LPDWORD lpdwProcessId
);
Parameters
- hWnd
-
[in] Handle to the window.
- lpdwProcessId
-
[out] Pointer to a variable that receives the process identifier. If this parameter is not NULL, GetWindowThreadProcessId copies the identifier of the process to the variable; otherwise, it does not.
Return Value
The return value is the identifier of the thread that created the window.
Function Information
| Minimum DLL Version | user32.dll |
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| Header | Declared in Winuser.h, include Windows.h |
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| Import library | User32.lib |
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| Minimum operating systems |
Windows 95, Windows NT 3.1 |
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See Also
Windows Overview