CMAPI CONFIGRET WINAPI CM_Get_Device_ID_Size_Ex( _Out_ PULONG pulLen, _In_ DEVINST dnDevInst , _In_ ULONG ulFlags, _In_opt_ HMACHINE hMachine );
- pulLen [out]
Receives a value representing the required buffer size, in characters.
- dnDevInst [in]
Caller-supplied device instance handle that is bound to the local machine.
- ulFlags [in]
Not used, must be zero.
- hMachine [in, optional]
Caller-supplied machine handle to which the caller-supplied device instance handle is bound.
Note Using this function to access remote machines is not supported beginning with Windows 8 and Windows Server 2012, as this functionality has been removed.
If the operation succeeds, the function returns CR_SUCCESS. Otherwise, it returns one of the CR_-prefixed error codes defined in Cfgmgr32.h.
The CM_Get_Device_ID_Size_Ex function should be called to determine the buffer size required by CM_Get_Device_ID_Ex.
The size value supplied in the location pointed to by pulLen is less than MAX_DEVICE_ID_LEN, and does not include the identifier string's terminating NULL. If the specified device instance does not exist, the function supplies a size value of zero.
For information about device instance IDs, see Device Identification Strings.
For information about using device instance handles that are bound to a local or a remote machine, see CM_Get_Child_Ex.
Functionality to access remote machines has been removed in Windows 8 and Windows Server 2012 and later operating systems thus you cannot access remote machines when running on these versions of Windows.
|Available in Microsoft Windows 2000 and later versions of Windows.|