Controlling recording Input level

I want to control the input (gain) level from the microphone. I've looked through the Window's API and see nothing for doing this. I've manually set the mic recording level to it's highest position and set the mic boost check box in the volume control dialog, but the recording is still way too low. On the Mac, I can set either an automatic gain control or set the recording level manually. I've tried several types of mic's and visited the jumpers for the sound card but nothing helps. If you speak 4 feet from the mic and in a normal volume you cannot clearly hear the audio. I'm recording speech in a quiet location and need high input gain.
RadNetGMLAsked:
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RadNetGMLAuthor Commented:
Edited text of question
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chensuCommented:
You can use Win32 Audio Mixers API (mixer*() functions) to control it. There is a sample "Mixapp: Sample Mixer Application" that comes with Win32 SDK.
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RadNetGMLAuthor Commented:
The specific calling order for the mixer and what api for the
input volume would of been great. Thanks for pointing me in the
right direction.

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chensuCommented:
1. mixerOpen()
2. mixerGetLineInfo() (MIXERLINE_COMPONENTTYPE_DST_WAVEIN or MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE)
3. mixerGetLineControls() (MIXERCONTROL_CONTROLTYPE_VOLUME)
4. mixerSetControlDetails()
5. mixerClose()

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