Q46849: During INPUT, CTRL+T Displays Softkeys on Line 25

Article: Q46849
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | SR# S890627-171 B_BasicCom | mspl13_basic
Last Modified: 27-DEC-1989

During an INPUT statement, pressing CTRL+T causes a number line to
display on line 25 of the screen. These numbers correspond to the
softkeys that you can define and label with the KEY statement in
BASIC. This behavior is not documented and occurs in all screen modes.

This information applies to Microsoft QuickBASIC Versions 4.00, 4.00b,
and 4.50, to Microsoft BASIC Compiler Versions 6.00 and 6.00b, and to
Microsoft BASIC PDS Version 7.00.

To prevent this behavior, you can trap for CTRL+T using the KEY
statement. The key combination is trapped during the INPUT statement
but is not acted upon until after the INPUT statement is terminated.
This delay allows you to trap for the key and simply RETURN from the
label.

The following sample code prevents display of the softkey line during
the INPUT of the string:

KEY 15, CHR$(&H04) + CHR$(&H14)     'delete these lines
KEY(15) ON                          'to see the softkey
ON KEY(15) GOSUB KeyPressed         'display during input

   PRINT "hit CTRL+T then,"
   PRINT "enter a string"
   INPUT AnyString$

END

KeyPressed:
     RETURN

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