Definition/explanation Required

i have this function/request

If Request.QueryString("mode") = "go" then
objRec.Open "Gigs", objConn,2,2,&H0002
objRec.Filter = "id=1"
objRec("venuedate") = ChkString(Request.Form("gigs"))
objRec.Update
Response.Write "The changes have now been saved"
Response.Write objRec("venuedate")
Else
'response.Write("splip")
strSQL = "SELECT * FROM Gigs Where id=1"
objRec.Open strSQL,objConn,0,1

what i would like to know is how this part works specifically the ,#,#,####:
objRec.Open "Gigs", objConn,2,2,&H0002
objRec.Open strSQL,objConn,0,1