widl: added dispinterface and coclass

[Robert Shearman]

Mike Hearn wrote:

> Jacek Caban wrote:
>
>> Changelog:
>>   - Added creation of dispinterface header
>>   - Added creation of coclass header
>>   - Added messages when fopen failes
>
>
> Cool! How far away are we from having widl generate the proxy/stub 
> marshalling code? I started writing some COM test cases last night but 
> it's really hard to test anything non-trivial without a test object 
> that supports marshalling and I doubt Alexandre would want MIDL code 
> in the test suite (or maybe he would, that is what we have to run 
> after all ...)


This has nothing to do with proxy/stub marshalling. It is a step towards 
type library generation though.

Rob