[MSDN Library April 2000] Interfaces and Interface Implementations (75%)
MSDN Library - April 2000 > Platform SDK > Component Services > COM > COM Fundamentals > Guide > The Component Object Model > COM Objects and Interfaces
[MSDN Library April 2000] Interfaces in Distributed Objects (47.4728260869565%)
MSDN Library - April 2000 > Platform SDK > Component Services > COM > Microsoft Interface Definition Language (MIDL) > Interface Definitions and Type Libraries
[MSDN Library April 2000] Interfaces (41.3461538461538%)
MSDN Library - April 2000 > Platform SDK > Component Services > COM > Structured Storage > Structured Storage Reference
[MSDN Library April 2000] Interfaces and Interface Attributes (38.5096153846154%)
MSDN Library - April 2000 > Books > Inside OLE > Chapter 2 Objects and Interfaces
[MSDN Library April 2000] Interfaces and OLE API Functions (35.3846153846154%)
MSDN Library - April 2000 > Books > Inside OLE > Chapter 2 Objects and Interfaces