You may of already solved this but it if not, then first from what I remember you need an ending slash in this line:

PHPIniDir "C:/php" -- should be
PHPIniDir "C:/php/"

Secondly have you setup the environment variable in windows ?

For PHP to work with Apache and to make the CLI available from any command prompt window, you need to add the PHP folder to the PATH environment variable.
_________________________
Unless you try something to which you have not already succeeded ~ Then you shall NEVER grow