Microsoft KB Archive/51075

= QB 4.x Editor Does Not Flag VARPTR$ Error, but BC.EXE Does =

Article ID: 51075

Article Last Modified on 11/21/2006



This article was previously published under Q51075



SYMPTOMS
VARPTR$ can be used only with simple variables and with arrays of variable-length strings. Attempting to use the VARPTR$ function on a $DYNAMIC array is a programming error. However, the QB.EXE versions 4.00, 4.00b, and 4.50 editors will not flag this as an error and will interpret and run programs that use VARPTR$ on $DYNAMIC arrays. The BC.EXE compiler Versions 4.00, 4.00b, and 4.50 correctly flag this as an error and give the error message &quot;Dynamic array element illegal.&quot;

This problem has been corrected in QBX.EXE, which comes with Microsoft Basic Compiler Version 7.00 (fixlist7.00).



MORE INFORMATION
The VARPTR$ function is used with both the PLAY and the DRAW statements to return the string representation of the address of a variable. The following code example demonstrates the problem in the QuickBasic editor.

Code Example
REM $DYNAMIC CLS TYPE aa         a AS INTEGER END TYPE REDIM a(50) AS aa    a(1).a = 10 PRINT VARPTR$(a(1).a)    END

Additional query words: QuickBas BasicCom buglist4.00 buglist4.00b buglist4.50 B_BasicCom

Keywords: KB51075

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