|Line 1:||The declaration of an HRESULT.
This is used to hold the return value of COM calls.|
|Lines 2 and 3:||Here MyComObject is initialized and we get an interface pointer to interface IMyComObject. We will cover the details of how this is done in the next module. |
|Line 4:||A call is made to IMyComInterface::Fx2.|
|Line 5:||A check is made on the return value from Fx2. FAILED is a standard COM error checking macro.|
|Lines 7:||This declares a variable as a pointer to COM interface IYourComInterface.|
|Lines 9 and 10:||IMyComInterface::QueryInterface is called to get a pointer to IYourComInterface.|
|Line 13:||If the QueryInterface call is successful, this calls IYourComInterface::Zx1.|
|Line 14:||The FAILED macro is used to check the status of the previous COM call.|
|Line 16:||This calls IMyComInterface::Release.|
|Line 17:||This calls IYourComInterface::Release. Interface pointers held by a client should be considered invalid after calling Release.