How do I alter a wave files speed and pitch on playback?

Taking a wave that I created using the MCI Control, how do I alter its speed and pitch at playback?

I stumbled upon the following APIs:

waveOutGetPlayBackRate
waveOutSetPlayBackRate
waveOutGetPitch
waveOutSetPitch

But each of these require a handle to the Wave that I'm playing. How do I find this handle?

As always, I appreciate the guidance.