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.VARPTR$ Function Details.

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VARPTR$ Function Details
The variablename is the name of a variable in the program.
If variablename is an array element, then the array must be dimensioned
before the VARPTR$ function is used. The array must be an array of
variable-length strings.
  Note: To guarantee correct results, use the value of VARPTR$
        immediately after invoking the function.
Differences from BASICA
In QuickBASIC programs, VARPTR$ must be used in the DRAW and PLAY
statements to execute substrings containing variables.
BASICA supports both the VARPTR$ syntax and the syntax containing just the
variable name.
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