Macros in Imsample.c

// Extract the error code from an HRESULT 
 
#define CODEFROMHRESULT(hRes) ((hRes) & 0x0000FFFF) 
 
#ifdef _DEBUG 
#define ASSERT(x)       assert(x) 
#else 
#define ASSERT(x) 
#endif 
 
// Used to keep the compiler from issuing warnings about any unused 
// parameters. 
 
#define USE_PARAM(x)    (x) = (x)