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(
LPHACMDRIVER phad,
HACMDRIVERID hadid,
DWORD fdwOpen
);
Parameters
phad
Pointer to a buffer that receives the new driver instance handle that can be used to communicate with the driver.
hadid
Handle to 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.
| Value | Description |
| 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. |
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Msacm.h.
** Library:** Use Msacm32.lib.
See Also