CMAPI CONFIGRET CM_Get_Device_ID_List_SizeA( PULONG pulLen, PCSTR pszFilter, ULONG ulFlags );
Receives a value representing the required buffer size, in characters.
Caller-supplied pointer to a character string specifying a subset of the machine's device instance identifiers, or NULL. See the following description of ulFlags.
One of the optional, caller-supplied bit flags that specify search filters. If no flags are specified, the function supplies the buffer size required to hold all instance identifiers for all device instances. For a list of bit flags, see the ulFlags description for CM_Get_Device_ID_List.
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_List_Size function should be called to determine the buffer size required by CM_Get_Device_ID_List.
The size value supplied in the location pointed to by pulLen is guaranteed to represent a buffer size large enough to hold all device instance identifier strings and terminating NULLs. The supplied value might actually represent a buffer size that is larger than necessary, so don't assume the value represents the true length of the character strings that CM_Get_Device_ID_List will provide.
For information about device instance IDs, see Device Identification Strings.
|Minimum supported client||Available in Microsoft Windows 2000 and later versions of Windows.|
|Header||cfgmgr32.h (include Cfgmgr32.h)|