Hello everyone,
I have built MSDN OLE DB Sample Provider and successfully built/debug it
using Microsoft Excel as client. I have found that in DllGetClassObject
(classfac.cpp), the class SampProv is initialized as the 1st coclass, then
DataSource object will be created in QueryInterface.
http://msdn2.microsoft.com/en-us/library/ms715011.aspx
The entry point of a COM server (like this Sample OLE DB Provider) is
creating a coclass through DllGetClassObject. My question is, how did
Microsoft Excel find the entry point coclass of the OLE DB Provider is
SampProv coclass?
I have this question because Excel is a client with no knowledge about any
specific application defined CLSID, like SampProv, how could it be aware of
this ID (i.e. Excel knows nothing about 3rd party application's specific name
of entry point coclass)? In Windows registry, I can not find any related
information indicating that SampProv should be the entry point coclass either.
thanks in advance,
George
