OpenEuphoria

Not sure about CUINT (did you mean C_UINT?), but the rest are defined in either dll.e (3.1.1 compatibility library) or std/dll.e (4.0 stdlib). If you include both std/dll.e and dll.e, be sure to use namespaces to avoid the inevitable naming conflicts (it'll probably be easier to rewrite the code to only use one or the other - or alternatively use a 4.0 versin of w32lib).