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 CONVERSION

 The Conversion functions allow numeric values to be converted
 between hexadecimal and binary strings and back to numeric values.
 Additionally, the C_NTOL() and C_LTON() functions allow conversion
 between a disk drive letter and a disk drive number.

 C_HEX2DEC()         C_NTOL()
 C_DEC2HEX()         C_BIN2NUM()
 C_LTON()            C_NUM2BIN()