Where is DRV_QUERYFUNCTIONINSTANCEID declared?

Question

This question is related to this one.

I need to use the winmm function waveInMessage using the above mentioned constant. I can find a bunch of similar defines (such as DRV_QUERYDEVICEINTERFACE) in the mmddk.h, but the pair DRV_QUERYFUNCTIONINSTANCEID and DRV_QUERYFUNCTIONINSTANCEIDSIZE is not. They are mentioned in the MSDN document entitled "Device Roles for Legacy Windows Multimedia Applications", which makes no reference to header files used in the example.

Answer 1

#include <mmddk.h>

What compiler are you using?

• Download the latest Platform SDK for Windows if you're using VC++.
• In case of, e.g MinGW, new headers should be available.

I bet your problem is related to old header files.