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 CTOBIT()
 Converts a character string into a bit pattern
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 Syntax

     CTOBIT(<cCharacterstring>,<cBitpattern>) --> nWORD

 Arguments

     <cCharacterstring>  Designates a character sequence.  When this
     sequence occurs in the second character string, each corresponding bit
     is set to 1.

     <cBitpattern>  Designates a sequence, with a maximum of 16
     characters, from which the bit position is assigned.

 Returns

     CTOBIT() returns a number in the range of 0 to 65535 that corresponds to
     the created bit pattern.

 Description

     The CTOBIT() function delivers a bit pattern that corresponds to a
     string of individual characters.  When used in conjunction with its
     sister function BITTOC(), it facilitates work with such bit-coded
     information as file attributes.

 Note

     .  Characters in <cCharacterstring> that are not found in
        <cBitpattern> are ignored.

 Examples

     .  The second bit in the resulting value is set, since the letter
        "H" appears in the next-to-last position in "ADVSHR":

        ? CTOBIT("H", "ADVSHR")          // Result:  00000010

     .  Two characters also in ADVSHR, appear at the first and final
        positions in this 6-character string:

        ? CTOBIT("RA", "ADVSHR")         // Result:  00100001

     .  <cBitpattern> ignores previously unavailable characters:

        ? CTOBIT("XRYA", "ADVSHR")       // Result:  00100001