procedure WriteBinaryOptions( offset : longint;dataType,convertType : Str255;min,max : real; isPC : boolean);

Specifies offset and convertion type for binary file writing.  The dataType is one of:

Byte
Integer
Unsigned16
Longint
Real

The convertType is one of:

TypeMinMax
DataMinMax
CustomMinMax

If CustomMinMax is chosen then the max and min are used for scaling otherwise they are ignored.  If isPC is TRUE the file is read in PC format.

Also see:  TextOptions  OpenData  ConvertPC2Mac  ReadBinaryOptions