[Bug 22146] 64bit compatibility issue with Wine's MCI string command parser

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=22146





--- Comment #1 from Jörg Höhle <hoehle at users.sourceforge.net>  2010-03-24 04:23:40 ---
Dmitry Timoshkov tells me:
"HWND is defined in windef.h ...  a generic pointer."
Perhaps I looked in some other place like wtypes.h and was mislead.

Well, we have those options
A) Define and use MCI_INTEGER64, and
B) Special-case MCI_STATUS' integer return type
C) ?

My plan is to produce 2 patches along the B route. That's "good enough" and
much better than what's currently in git (i.e. it might work :).  It can and
should be superseded by an "A route" patch as soon as somebody shows evidence
that native knows about such a special return type, either from documentation
or from a resource dump of a 64bit winmm.dll or mciav32.dll if that's legal.
The second patch would handle MCI_HWND, MCI_HDC and MCI_HPAL types.

Perhaps MS changed MCI_STATUS' return type to DWORD_PTR precisely because some
status command may return handles, e.g. MCI_DGV_STATUS_HWND or
MCI_DGV_STATUS_HPAL?

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