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60 lines
2.3 KiB
Plaintext
60 lines
2.3 KiB
Plaintext
'''Metacommands''' are program wide commands that start with $.
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==Legacy metacommands (Qbasic/QuickBASIC)==
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===Syntax===
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:REM [[$INCLUDE]]: '[[QB.BI]]' 'loads a reference file or library
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:REM [[$DYNAMIC]] 'enables resizing of array dimensions with REDIM
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:REM [[$STATIC]] 'arrays cannot be resized once dimensioned
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===Description===
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* Qbasic Metacommands are normally used at the program start and are in effect throughout the program.
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* Qbasic Metacommands are always prefixed with $ and MUST be commented with an apostrophe or [[REM]].
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* [[$INCLUDE]] is always followed by a colon and the full text code file name is commented on both sides.
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* [[$DYNAMIC]] allows larger arrays that are changeable in size at runtime.
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* [[$STATIC]] makes all arrays unchangeable in size.
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* '''Qbasic metacommands should have their own program line because they are commented.'''
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==QB64 metacommands==
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===Syntax===
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:[[$CHECKING]]{OFF|ON} 'disables QB64 C++ event and error checking (no spaces)
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:[[$CONSOLE]] 'creates a QB64 console window throughout the program
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:[[$RESIZE]]:{ON|OFF} 'determines if re-sizing of the program screen by the user is allowed(no spaces)
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:[[$SCREENHIDE]] 'hides the QB64 program window throughout the program
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:[[$SCREENSHOW]] 'displays the main QB64 program window
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:[[$EXEICON]]:'iconfile.ico' 'embeds an .ICO file into the final executable (Windows only)
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:[[$VERSIONINFO]]:key=value 'embeds version info metadata into the final executable (Windows only)
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:[[$IF]]...[[$END IF]] 'precompiler directive
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===Description===
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* [[$INCLUDE]] can be used at the beginning or at the end of program SUB procedures.
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* [[$CHECKING]]:OFF should only be used with '''errorless''' code where every CPU cycle counts! Use '''ON''' to re-enable event checking. Event checking can be turned OFF or ON throughout a program.
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* [[$CONSOLE]] creates a console window which can be turned off later with [[_CONSOLE]] OFF.
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* [[$RESIZE]]:ON allows a user to resize the program window. OFF is default.
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* [[$SCREENHIDE]] hides the QB64 program window throughout the program until [[$SCREENSHOW]] is used.
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* [[$IF]]...[[$END IF]] allows selective inclusion of code in the final program.
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* '''Do not comment out with ' or [[REM]] QB64-specific metacommands.'''
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{{PageSeeAlso}}
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* [[Statement]], [[Function (explanatory)]]
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* [[REM]]
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* [[DIM]], [[REDIM]]
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* [[ON TIMER(n)]]
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{{PageNavigation}}
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