Hello all,
I am now trying to use vb.net to run "Summary Statistics" GeoProcessing tool. The corresponding parameters in the "Summary Statistics" GeoProcessing is as follows:

The vb.net code:
Dim GP As GeoProcessor = New GeoProcessor()
Dim parameters As IVariantArray = New VarArray
parameters.Add("geri_db.DBO.BQ_Segment_1")
parameters.Add("C:\Users\lyao\Documents\ArcGIS\Default.gdb\BQ_Segment_1_Statistics1")
parameters.Add("geri_db.DBO.BQ_Segment_1.OBJECTID")
parameters.Add("MAX")
GP.Execute("Summary_Statistics_analysis", parameters, Nothing)