Thank you, Frank! That did the trick. Best regards, -Dan -----Original Message----- To: <wdmaudiodev@xxxxxxxxxxxxx> Subject: [wdmaudiodev] Re: Anyone tried using DRV_QUERYDEVICEINTERFACE[SIZE]? From: "Frank Yerrace" <frankye@xxxxxxxxxxxxx> Date: Tue, 21 Oct 2003 16:35:40 -0700 ---------------------------------------------------------------------------- ---- You should send this message to a device ID instead of a device handle. Frank Yerrace Microsoft Corporation This posting is provided "AS IS" with no warranties, and confers no rights. -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Daniel E. Germann Sent: Tuesday, October 21, 2003 4:29 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Anyone tried using DRV_QUERYDEVICEINTERFACE[SIZE]? Has anyone tried sending the DRV_QUERYDEVICEINTERFACESIZE message to a wave device? I tried using it (and its companion, DRV_QUERYDEVICEINTERFACE) on two Windows XP systems (one "Gold", one SP1), and they both seem to return MMSYSERR_NOTSUPPORTED (8). Both devices queried used WDM Audio drivers; one driver was signed and one driver was not signed. I tried both wave in and wave out devices. Any ideas? A fragment from my test program is pasted below. I am probably missing something obvious. Best regards, -Dan ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/