CoCreateInstance COM function to test the Class Factory interfaces.
- Create IDirectSound and IDirectSound8 objects using CreateDirectSound
and CreateDirectSound8 using a NULL device GUID.
- the sound format test. Plays a 5 second reference tone to help
debug issues with the tone duration and help detect stutter issues.
Prints explanations describing the sound format interactive
test. Then plays a 1 second test tone for each supported sound
format.
- the 3D sound tests. Performs the volume, panning, moving listener
tests, etc.
basic tests such as querying its characteristics and changing its
format.
Changing the format requires that we call SetcooperativeLevel first,
which means we need an hwnd. So the test must now link with
user32.dll.