[wdmaudiodev] Re: Support for installable drivers in 64bit Vista.

  • From: Eugene Muzychenko <emuzychenko@xxxxxxxxx>
  • To: Tom Eckert <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Sat, 10 Nov 2007 00:18:47 +0600

Hello Tom,

> Could someone from Microsoft please confirm if the same is true for a
> 64-bit install of Vista?  Or are the shut down altogether?

64-bit MME drivers are not fully supported even in 64-bit XP and 2003
Server. In these systems, 64-bit user-mode MME drivers are not loaded
for 32-bit applications (WOW64).

In Vista, winmm.dll does not look for "waveN" entry, only for the
single "wave" entry. If you replace "wdmaud.drv" with your driver file
name, your driver will be invoked but other drivers, including WDM
ones, will not be invoked.

Regards,
Eugene

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