$SCREENHIDE: Difference between revisions

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{{PageExamples}}
{{PageExamples}}
''Example:'' Hiding a program when displaying a message box in Windows.
''Example:'' Hiding a program when displaying a message box in Windows.
{{CodeStart}} '' ''
{{CodeStart}}
{{Cl|$SCREENHIDE}}
{{Cl|$SCREENHIDE}}
{{Cl|DECLARE DYNAMIC LIBRARY}} "user32"
{{Cl|DECLARE DYNAMIC LIBRARY}} "user32"

Revision as of 01:02, 23 January 2023

The $SCREENHIDE metacommand can be used to hide the main program window throughout a program.


Syntax

$SCREENHIDE


  • $SCREENHIDE may be used at the start of a program to hide the main program window when using a console window.
  • The _SCREENHIDE statement must be used before _SCREENSHOW can be used in sections of a program.
  • QB64 metacommands cannot be commented out with apostrophe or REM.


Examples

Example: Hiding a program when displaying a message box in Windows.

$SCREENHIDE
DECLARE DYNAMIC LIBRARY "user32"
  FUNCTION MessageBoxA& (BYVAL hWnd%&, BYVAL lpText%&, BYVAL lpCaption%&, BYVAL uType~&)
END DECLARE
DECLARE DYNAMIC LIBRARY "kernel32"
  SUB ExitProcess (BYVAL uExitCode~&)
END DECLARE
DIM s0 AS STRING
DIM s1 AS STRING
s0 = "Text" + CHR$(0)
s1 = "Caption" + CHR$(0)
ExitProcess MessageBoxA(0, _OFFSET(s0), _OFFSET(s1), 0)
Code by Michael Calkins


See also



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