acmDriverOpen

The acmDriverOpen function opens the specified ACM driver and returns a driver instance handle that can be used to communicate with the driver.

MMRESULT acmDriverOpen(

Parameters
phad

Address that will receive the new driver instance handle that can be used to communicate with the driver.

hadid

Handle of the driver identifier of an installed and enabled ACM driver.

fdwOpen

Reserved; must be zero.

Return Values
Returns zero if successful or an error otherwise. Possible error values include the following:

MMSYSERR_INVALFLAG	At least one flag is invalid.
MMSYSERR_INVALHANDLE	The specified handle is invalid.
MMSYSERR_INVALPARAM	At least one parameter is invalid.
MMSYSERR_NOMEM	The system is unable to allocate resources.
MMSYSERR_NOTENABLED	The driver is not enabled.

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