Hi,
thank you for your fast answer and for the links. This is my full command line...
g++-3.exe -Wall -g -fexceptions -DWIN=0 -g -I"C:/Codes" -c "C:/Codes/main.c" -o obj/Debug/Codes/main.o
If I try to change from WIN = 0 to WIN = 1 there are no differences. Can you help me?