The EnumProps function enumerates all entries in the property list of a window by passing them, one by one, to the specified callback function. EnumProps continues until the last entry is enumerated or the callback function returns FALSE.
int EnumProps(
HWND hWnd, // handle to window
PROPENUMPROC lpEnumFunc // pointer to callback function
);
The return value specifies the last value returned by the callback function. It is -1 if the function did not find a property for enumeration.
An application can remove only those properties it has added. It must not remove properties added by other applications or by the system itself.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winuser.h.
Import Library: Use user32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
Window Properties Overview, Window Property Functions, EnumPropsEx, GetProp, PropEnumProc, RemoveProp, SetProp