TACMWaveIn - this component is used for sampling 
audio (directly or through ACM codecs). This
component is derived from TWinControl.

TACMWaveIn - have 2 methods:

Open(format:PWaveFormatEx); format is  for example 
result from TACMDialog and the selected format is
used for compression. After executing this method
start component with sampling.

Close(); this method close the audio sampling

Events:

OnData(data:PChar;bytesrecorded:integer); - this event
is called when buffer is full. Data are audio data and 
bytesrecorded is length of audio data.