compiling an extension

hi there, i tried to compile the example-code for an extension from the php-manual. first i trief compiling it with borland c++ builder, but that didn't work. so i tried to compile it with vc++, but the i get the following errors: c:\_source_\php-source\ext\mod_test1\test.cpp(17) : error C2065: 'ZEND_DEBUG' : no declared constant. is the example-code wrong or are there some changes in the api ? hope somone can help me out. greets, marco