how to set a define "PALM_OS" in project setting ?

[Rodolphe Br�jaude]

Hello,

I have a .c file that must compile different part of code
depending on a define ex :
#ifdef _PALM_OS
    int i;
#else
  char i;
#endif

How can I set the _PALM_OS string as a compiling define in the 
project setting ?

thanks ?

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