以问题SWAP问题!!(100分)

请问那位高手指点以下MCISENDCOMMOND命令的参数值：
如：
CONT
SETAUDIO = $873;
MCI_DGV_SETAUDIO_SOURCE_LEFT=1;
MCI_DGV_SETAUDIO_SOURCE_STEREO=0;
MCI_DGV_SETAUDIO_SOURCE_RIGHT=2;
特别是后面的参数
库 $873
1;
0;
2;
从那找的我在HELP怎么找不到 如若能回答我绝对尽自己最努力回答他的问题

本来就不能在Delphi的帮助里找，你可以在Win32 SDK帮助里找到
详细的要看MSDN了

MCI_DGV_SETAUDIO_SOURCE

A constant specifying the source of audio input is included in the dwValue member of the structure identified by lpSetAudio. The following constants are defined for the audio input sources:
MCI_DGV_SETAUDIO_SOURCE_AVERAGE
The average of the left and right audio channels.
MCI_DGV_SETAUDIO_SOURCE_LEFT
Left audio channel.
MCI_DGV_SETAUDIO_SOURCE_RIGHT
Right audio channel.
MCI_DGV_SETAUDIO_SOURCE_STEREO
Stereo.