That is maybe very difficult to find.must at least know currently the original language (C or C++) and Visual Foxpro to translate original declarations .

for ex randomly in C++:

LRESULT CallWindowProc(
    WNDPROC lpPrevWndFunc,
    HWND hWnd,
    UINT Msg,
    WPARAM wParam,
    LPARAM lParam
);

to translate it into vfp declaration

DECLARE INTEGER CallWindowProc IN user32;
    LONG lpPrevWndFunc,;
    LONG hWnd,;
    LONG Msg,;
    INTEGER wParam,;
    INTEGER lParam

yes the documentation is also recquired for each function,constant,......its not shipped for most cases...(only the dll).I suppose its the goal to protect the data contained in.