Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lm
Writing Makefile for Net::sFlow

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

cp sFlow.pm blib\lib\Net\sFlow.pm

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

	C:\cpanrun\build\5-10-0\bin\perl.exe "-Iblib\lib" "-Iblib\arch" test.pl
ok 1 - use Net::sFlow;
ok 2 - use Math::BigInt;
1..2

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

Installing C:\cpanrun\build\5-10-0\html\site\lib\Net\sFlow.html
Installing C:\cpanrun\build\5-10-0\site\lib\Net\sFlow.pm
Appending installation info to C:\cpanrun\build\5-10-0\lib/perllocal.pod