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

Type: HWND

A handle to the window.

lpdwProcessId

Type: LPDWORD

A 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

Type: Type: DWORD

The return value is the identifier of the thread that created the window.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header winuser.h (include Windows.h)
Library User32.lib
DLL User32.dll

See Also

Windows Overview