Set Default Audio Device (DRVM_MAPPER_PREFERRED_SET)

要怎樣設定預設的音效裝置呢？就是用下面這段範例程式：

Sample code:
#define DRVM_MAPPER 0x2000
#define DRVM_MAPPER_PREFERRED_SET (DRVM_MAPPER+22）

waveOutMessage((HWAVEOUT)WAVE_MAPPER, DRVM_MAPPER_PREFERRED_SET, Preferred_Device_ID, 0);

Comment:
1. Add definition, "DRVM_MAPPER_PREFERRED_SET", to your code by hand.
2. Preferred_Device_ID changes when the order is changed.

Reference:
1.  waveOutMessage
http://msdn.microsoft.com/en-us/library/windows/desktop/dd743865%28v=vs.85%29.aspx
2. DRVM_MAPPER_PREFERRED_SET
http://msdn.microsoft.com/en-us/library/aa909789.aspx