You can also use MinGW to produce a win32 binary that runs under
Windows, without using Visual Studio .NET 2003 (v7).
1. Download MinGW.
2. Install.
3. (optional in Windows XP) Add "gcc" to the environment path, by
using "Start..Control Panel..System..Advanced..Environment Variables",
then "Path" to add the ";C:\MinGW\bin\".
4. Type "gcc lpc21isp.c".