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     CodeView expressions cannot contain BASIC procedures from the program
     being debugged. CodeView expressions can contain a limited number of
     BASIC intrinsic functions, as shown in the following table:
 
     Function    Returns/Performs     Argument type           Return type
     ────────────────────────────────────────────────────────────────────
     ASC         ASCII value of       STRING                  INTEGER
                 first character
 
     CINT        Data type conversion Numeric expression      INTEGER
 
     CLNG        Data type conversion Numeric expression      LONG
 
     CSNG        Data type conversion Numeric expression      SINGLE
 
     CDBL        Data type conversion Numeric expression      DOUBLE
 
     CCUR        Data type conversion Numeric expression      CURRENCY
 
     CVI         Data type conversion 2-byte STRING           INTEGER
 
     CVL         Data type conversion 4-byte STRING           LONG
 
     CVS         Data type conversion 4-byte STRING           SINGLE
 
     CVD         Data type conversion 8-byte STRING           DOUBLE
 
     CVC         Data type conversion 8-byte STRING           CURRENCY
 
     FIX         Conversion, with     Numeric expression      INTEGER
                 truncation
 
     INT         Conversion, with     Numeric expression      INTEGER
                 truncation
 
     VAL         Numeric value of     STRING                  INTEGER, LONG,
                 string                                       SINGLE, DOUBLE,
                                                              CURRENCY
 
     SADD        Offset portion of    STRING                  INTEGER
                 address of string
                 data
 
     SSEG        Segment portion of   STRING                  INTEGER
                 address of string
                 data
 
     SSEGADD     Segment and offset   STRING                  LONG
                 of string data
 
     VARPTR      Offset portion of    Variable name           INTEGER
                 address of variable
 
     VARSEG      Segment portion of   Variable name           INTEGER
                 address of variable
 
     VARPTRSEG   Segment and offset   Variable name           LONG
                 of variable
 
     LBOUND      Lower bound of an    Array name, dimension   INTEGER
                 array dimension
 
     UBOUND      Highest bound of an  Array name, dimension   INTEGER
                 array dimension
                                    -♦-