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This message requests an ACM driver to return detailed information about itself.
Parameters
- dwDriverID
- Specifies a driver instance identifier. The driver returns this value in response to the ACM_Openfunction.
- hDriver
- Handle to a driver.
- uMsg
- Specifies this message.
- lParam1
- Pointer to an ACMDRIVERDETAILSstructure. This structure is declared in the Msacm.h header file.
- lParam2
- Not used.
Return Values
MMSYSERR_NOERROR indicates success. Otherwise, the driver returns one of the MMSYSERR error values declared in the Mmsystem.h header file or one of the ACMERR error values declared in the Msacm.h header file.
Remarks
The ACM (Waveapi.dll) sends this message by calling the ACM driver's ACM_IOControlentry point through the DeviceIoControlfunction. The ACM sends this message when an application calls the acmDriverDetailsfunction, which is described in the Windows CE Platform SDK.
Before calling the driver's ACM_IOControlfunction, the ACM verifies that lParam1contains a valid pointer and that the cbStructmember of ACMDRIVERDETAILScontains a size value of at least 4.
The driver fills in the members of ACMDRIVERDETAILS, up to the number of bytes specified by the cbStructmember.
ACM drivers must support this message.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 1.0 and later Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
Last updated on Tuesday, July 13, 2004