public virtual int QueryStartClean(uint options, int[] supported, int[] ready)
{
CCITracing.TraceCall();
config.PrepareBuild(false);
if (supported != null && supported.Length > 0)
supported[0] = 1;
if (ready != null && ready.Length > 0)
ready[0] = (IsInProgress()) ? 0 : 1;
return VSConstants.S_OK;
}