Use string(10) like this :
Dim queryString(9) As String
queryString(0) = "queryString1"
queryString(1) = "queryString2"
queryString(2) = "queryString3"
queryString(3) = "queryString4"
queryString(4) = "queryString5"
queryString(5) = "queryString6"
queryString(6) = "queryString7"
queryString(7) = "queryString8"
queryString(8) = "queryString9"
queryString(9) = "queryString10"
Using connection As New SqlConnection(SQLConnectionStr)
For i As Integer = 0 To 9
Dim command As New SqlCommand(queryString(I), connection)
connection.Open()
Dim reader As SqlDataReader = command.ExecuteReader()
While reader.Read()
Controls.Item("LblStckRnk" & i+1).Text() = reader("EMPLOYEE")
End While
reader.Close()
Next
End Using