shell32: implement the progman DDE interface (try 2)

[Alexandre Julliard]

Damjan Jovanovic <damjan.jov at gmail.com> writes:

> Changelog:
> * shell32: implement the progman DDE interface
>
> This attempt calls CoInitialize() only when needed, and icon handling
> has been tested, fixed and simplified.

I know this is not performance-critical, but the code is quite
inefficient, especially with memory allocations. That also makes it hard
to read because it adds a lot of unneeded complexity.

-- 
Alexandre Julliard
julliard at winehq.org