BUG: IsEqualGUIDBase(...) Always Returns TRUE Under C++

• Microsoft OLE Database, version 1.0

SYMPTOMS

In the Oledb.h header file, the IsEqualGUIBase(...) function is defined by the following lines:

   #ifdef __cplusplus
   inline BOOL IsEqualGUIDBase(const GUID &rguid1, const GUID  &rguid2)
   { return !memcmp(&(rguid1.Data2), &(rguid1.Data2),    sizeof(GUID) -
   sizeof(rguid1.Data1)); }

WORKAROUND

To work around this problem, change the second parameter in the memcmp function from rguid1.Data2 to rguid2.Data2. The following is the correct function definition:

   #ifdef __cplusplus
   inline BOOL IsEqualGUIDBase(const GUID &rguid1, const GUID  &rguid2)
   { return !memcmp(&(rguid1.Data2), &(rguid2.Data2),    sizeof(GUID) -
   sizeof(rguid1.Data1)); }

STATUS

Microsoft has confirmed this to be a problem in the OLE Database SDK version 1.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.