WDParam
#include <Files.h>
typedef struct WDParam { Size Offset Description short filler9; 2 24
short ioWDIndex; 2 26
long ioWDProcID; 4 28
short ioWDVRefNum; 2 32
short filler10; 2 34
long filler11; 4 36
long filler12; 4 40
long filler13; 4 44
long ioWDDirID; 4 48