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FindWindowEx info  Overview  Group

The FindWindowEx function retrieves the handle to a window whose class name and window name match the specified strings. The function searches child windows, beginning with the one following the given child window.

HWND FindWindowEx(

    HWND hwndParent,

// handle to parent window

    HWND hwndChildAfter,

// handle to a child window

    LPCTSTR lpszClass,

// pointer to class name

    LPCTSTR lpszWindow

// pointer to window name

   );

Parameters

hwndParent
Identifies the parent window whose child windows are to be searched.

If hwndParent is NULL, the function uses the desktop window as the parent window. The function searches among windows that are child windows of the desktop. If hwndParent is HWND_MESSAGE, the function searches all message-only windows.

hwndChildAfter
Identifies a child window. The search begins with the next child window in the Z order. hwndChildAfter must be a direct child window of hwndParent, not just a descendant window.

If hwndChildAfter is NULL, the search begins with the first child window of hwndParent.

Note that if both hwndParent and hwndChildAfter are NULL, the function searches all top-level and message-only windows.

lpszClass
Points to a null-terminated string that specifies the class name or is an atom that identifies the class-name string. If this parameter is an atom, it must be a global atom created by a previous call to the GlobalAddAtom function. The atom, a 16-bit value, must be placed in the low-order word of lpszClass; the high-order word must be zero.
lpszWindow
Points to a null-terminated string that specifies the window name (the window’s title). If this parameter is NULL, all window names match.

Return Values

If the function succeeds, the return value is the handle to the window that has the specified class and window names.

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

See Also

EnumWindows, FindWindow, GetClassName, GlobalAddAtom

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