So if you have MDAC 2.8 installed in Windows XP your program can be compiled against the ADO 2.5 typelib and it will work. All of these TLBs point to msado15.dll and each has the subset of class IDs supported in the MDAC release it matches. You get one for ADO 2.0, one for ADO 2.1, one for ADO 2.5, etc. In order for old programs compiled referencing earlier MDAC releases to keep running, a series of typelibs is installed. The newest ADO on your system is always named msado15.dll, which is not ADO 1.5 but instead it is the newest version (and only version) installed. At that time updates to MDAC were really Windows updates.īeginning with MDAC 2.5 a new strategy started in an attmpt to relieve a bit of DLL Hell. You cannot download 6.0 for installation in a pre-6.0 version of Windows (Vista is Windows 6.0).īeginning with about SP2 of Windows 2000 MDAC became a part of Windows, not an optional installable item. MDAC 2.8 will not install into Vista though it may let you think it did.
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