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EnumWindows info  Overview  Group

The EnumWindows function enumerates all top-level windows on the screen by passing the handle of each window, in turn, to an application-defined callback function. EnumWindows continues until the last top-level window is enumerated or the callback function returns FALSE.

BOOL EnumWindows(

    WNDENUMPROC lpEnumFunc,

// pointer to callback function

    LPARAM lParam 

// application-defined value

   );

Parameters

lpEnumFunc
Points to an application-defined callback function. For more information, see the EnumWindowsProc callback function.
lParam
Specifies a 32-bit, application-defined value to be passed to the callback function.

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 EnumWindows function does not enumerate child windows.

This function is more reliable than calling the GetWindow function in a loop. An application that calls GetWindow to perform this task risks being caught in an infinite loop or referencing a handle to a window that has been destroyed.

See Also

EnumChildWindows, EnumWindowsProc, GetWindow 

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