C / C++ / MFC

BOOL PreCreateWindow( CREATESTRUCT cs )
{
    cs.style =| WS_HSCROLL | WS_VSCROLL;

    ...
}

#ifdef WIN32<br />
... Do stuff, that is specific to windows, say an optimised verison of a socket class.<br />
class Socket...<br />
class ThreadWrapper<br />
#else<br />
... Do stuff for Unix in here, if you are only working with 2 platforms.<br />
class Socket...<br />
class ThreadWrapper<br />
#endif

#ifdef MYLIB_EXPORTS	// specified in compiler options<br />
#define MYLIB_API __declspec(dllexport)<br />
#else<br />
#define MYLIB_API __declspec(dllimport)<br />
#endif<br />
<br />
// This class is exported from the mylib.dll<br />
class MYLIB_API CSampleClass {<br />
public:<br />
	CSampleClass(void);<br />
	// TODO: add your methods here.<br />
};

You should look at tools like GNU autoconf/automake. I don't know if they work on windows, but they help a lot in dealing with the differences between various Unix versions.

Of course if you only target one Unix (Solaris) you won't care, and even with two it might not be worth the trouble. If you want to make an attempt at supporting more (say all of them...) you will want some help.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)