How to assign the make variant?

[weworld]

Hi! Are there any means to specify the variant value of make in C::B? for example, I use this to compile dialogs example in wxWidgets:

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mingw32-make -f makefile BUILD=realese UNICODE=0 SHARED=0 MONOLITHIC=0 USE_XRC=1

Can C::B specify these values when i use a makefile? I have tried to specify it in "make" command or Custom Variant Options, but it not works.
Please help! Thanks.