KSC Open API  13.1
Kaspersky Security Center API description
HostGroup::ZeroVirusCountForGroup ( int  nParent,
[out] wstring  strActionGuid 
)

Resets counters of viruses found on hosts in the specified administration group and all subgroups.

Parameters:
nParent(int) ID of the administration group to start from.
[out]strActionGuid(wstring) ID of an asynchronous operation. To get a status, use AsyncActionStateChecker.CheckActionState. lStateCode "1" means OK and "0" means failure.