#define __STDC_WANT_LIB_EXT1__ 1
#include <stdlib.h>
#include <stdio.h>

void main( void )
{
    char    buffer[128];
    size_t  len;

    if( getenv_s( &len, buffer, sizeof( buffer ), "INCLUDE" ) == 0 )
        printf( "INCLUDE=%s\n", buffer );
}