acmDriverID function (msacm.h)

The acmDriverID function returns the handle of an ACM driver identifier associated with an open ACM driver instance or stream handle.

Syntax

MMRESULT ACMAPI acmDriverID(
  HACMOBJ        hao,
  LPHACMDRIVERID phadid,
  DWORD          fdwDriverID
);

hao

Handle to the open driver instance or stream handle. This is the handle of an ACM object, such as HACMDRIVER or HACMSTREAM.

phadid

Pointer to a buffer that receives a handle identifying the installed driver that is associated with hao.

fdwDriverID

Reserved; must be zero.

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

Return code	Description
MMSYSERR_INVALFLAG	At least one flag is invalid.
MMSYSERR_INVALHANDLE	The specified handle is invalid.
MMSYSERR_INVALPARAM	At least one parameter is invalid.

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	msacm.h
Library	Msacm32.lib
DLL	Msacm32.dll