Waveform Input Driver Messages (Compact 2013)

3/26/2014

The following table shows the waveform input driver messages (WIDM_XXX).

Programming element	Description
WIDM_ADDBUFFER	This message is used to request a waveform input driver to add an empty input buffer to its input buffer queue.
WIDM_CLOSE	This message is used to request a waveform input driver to close a specified device instance previously opened with WIDM_OPEN.
WIDM_GETDEVCAPS	This message is used to request a waveform input driver to return the capabilities of a specified device.
WIDM_GETNUMDEVS	This message is used to request a waveform input driver to return the number of devices that it supports.
WIDM_GETPOS	This message is used to request a stream input driver to return the current input position within a waveform. The input position is relative to the first recorded sample of the waveform.
WIDM_GETPROP	This message is used to request the properties of a waveform input driver.
WIDM_OPEN	This message is used to request a waveform input driver to open a stream of a specified device.
WIDM_PREPARE	This message is used to request a waveform input driver to prepare a system-exclusive data buffer for input.
WIDM_RESET	This message is used to request a waveform input driver to stop recording and return all buffers in the input queue to the caller.
WIDM_SETPROP	This message is used to request a waveform input driver to change properties.
WIDM_START	This message is used to request a waveform input driver to begin recording.
WIDM_STOP	This message is used to request a waveform input driver to stop recording.
WIDM_UNPREPARE	This message is used to request a waveform input driver to undo the buffer preparation that was performed in response to a WIDM_PREPARE message.

See Also

Reference

Waveform Audio Driver Reference
Waveform Output Driver Messages
WPDM Messages
Audio PDD Functions
Waveform Audio Driver Functions
Waveform Audio Driver Structures