Microsoft KB Archive/37484

= SCREEN Function Returns 32 for ASCII Byte 196 in SCREEN 3 =

Article ID: 37484

Article Last Modified on 8/16/2005

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APPLIES TO


 * Microsoft QuickBasic 4.0
 * Microsoft QuickBASIC 4.0b
 * Microsoft QuickBasic 4.5 for MS-DOS
 * Microsoft BASIC Compiler 6.0
 * Microsoft BASIC Compiler 6.0b
 * Microsoft BASIC Professional Development System 7.0
 * Microsoft BASIC Professional Development System 7.1

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This article was previously published under Q37484



SYMPTOMS
The SCREEN function returns an ASCII value of 32 (a blank) for the character CHR$(196) in the Hercules graphics mode (SCREEN 3). The correct value (196) correctly returns in any other screen mode. The program below demonstrates the problem and gives a listing of other characters that the screen function will return 32.



STATUS
Microsoft has confirmed this to be a bug in Microsoft QuickBasic versions 4.00, 4.00b, and 4.50 for MS-DOS; in Microsoft Basic Compiler versions 6.00 and 6.00b for MS-DOS (buglist6.00, buglist6.00b); and in Microsoft Basic PDS versions 7.00 and 7.10 (buglist7.00, buglist7.10) for MS-DOS. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
The following code example demonstrates the problem: CLS SCREEN 3 OPEN &quot;prints32.dat&quot; FOR OUTPUT AS #1 FOR x = 0 TO 255 CLS PRINT CHR$(x) PRINT SCREEN(1, 1) WHILE INKEY$ = &quot;&quot;: WEND IF SCREEN(1, 1) = 32 THEN PRINT #1, x  NEXT x   CLOSE The SCREEN function returns an ASCII value of 32 (blank) for the following ASCII characters:

chr$(0)

chr$(7)

chr$(9)

chr$(10)

chr$(11)

chr$(12)

chr$(13)

chr$(28)

chr$(29)

chr$(30)

chr$(31)

chr$(32)

chr$(196) ' <<====== Returns ASCII 32 (blank) only in SCREEN 3

chr$(255)

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

Keywords: KB37484

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