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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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6e01fc8dce
Added new _STRCMP and _STRICMP commands for quick string comparisons. Cleaned up QB64 to finish removing the QUI (quick user insert) code and folders. Altered UCASE and LCASE routines to be faster in some situations for us.
52 lines
1.3 KiB
Plaintext
52 lines
1.3 KiB
Plaintext
The SIGNAL keyword was reserved for OS/2 systems (protected mode). See the example for more information about how and why it is used.
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{{PageSyntax}}
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:: [[ON]] SIGNAL(number) [[GOSUB]] line
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:: SIGNAL(number) [[ON]]
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*'''[[Keywords currently not supported by QB64|Currently NOT supported in QB64!]]'''
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* It will only work with compiler 6.00 and 6.00b and Basic PDS 7.00 when compiling in protected mode under OS/2. In all other situations, a SIGNAL statement results in an "Advanced feature unavailable" error message.
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''Example:''
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{{CodeStart}}
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'' ''
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{{Cl|PRINT}} "This program traps CTRL+BREAK in OS/2. Try it."
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{{Cl|ON}} SIGNAL(4) {{Cl|GOSUB}} trap
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{{Cl|SIGNAL}}(4) {{Cl|ON}}
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10 a$ = {{Cl|INKEY$}}
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{{Cl|IF...THEN|IF}} a$ = "" {{Cl|THEN}} {{Cl|GOTO}} 10
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{{Cl|END}}
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trap:
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{{Cl|PRINT}} "CTRL+BREAK trapped. Press any key to quit"
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{{Cl|RETURN}} '' ''
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{{CodeEnd}}
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''Output:'' It returns the following when Ctrl-Break is pressed
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{{OutputStart}}
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This program traps CTRL+BREAK in OS/2. Try it.
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CTRL+BREAK trapped. Press any key to quit
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{{OutputEnd}}
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''Error message in QB4.5 if not using OS 2:''
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{{OutputStart}}
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Advanced feature unavailable
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{{OutputEnd}}
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''Source:'' Microsoft KB41389 [[http://support.microsoft.com/kb/41389]]
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''See also:''
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* [[ON KEY (n)]]
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{{PageNavigation}} |