When a name is defined twice (Const/Const, Dim/Const, Const/Dim, Dim/Dim, Sub vs Const/Dim, Class vs Const/Dim/Function, duplicate class members), Windows returns VBScript error 1041 ("Name redefined"). Wine was returning E_FAIL. Store source locations in const_decl_t, dim_decl_t, function_decl_t, and class_decl_t so errors point to the duplicate name. Also fix duplicate Sub/Function/Property/Dim detection inside classes, including the case where a Property collides with an existing Sub/Function. -- v21: vbscript: Return "Name redefined" error for duplicate class members. vbscript: Return "Name redefined" error for duplicate global declarations. vbscript: Track source location in const, class, and function declarations. https://gitlab.winehq.org/wine/wine/-/merge_requests/10464