Project preprocessor definitions

When I build the snippetRunner example without changing AcroDsOptions.rsp settings, it compiles and build the .api file without any problem. When changing the settigns of the ACRO_SDK_LEVEL to 0x000A0000, removing /D PI_ACROCOLOR_VERSION=0x00060000 and adding /D READER_PLUGIN,   I got a lot of errors?!!!!

I'm working with viusal studion 2008, with acrobat 10 skd.

Any help is appreciated...