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  • Example of timeout
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Stored procedures
Allows you to:
  • define a timeout,
  • give control back to Windows,
  • give control back to Windows and to WLanguage.
Versions 17 and later
WINDEVLinux This function is now available for WINDEV applications in Linux.
Linux This function is now available for WEBDEV sites in Linux.
New in version 17
WINDEVLinux This function is now available for WINDEV applications in Linux.
Linux This function is now available for WEBDEV sites in Linux.
WINDEVLinux This function is now available for WINDEV applications in Linux.
Linux This function is now available for WEBDEV sites in Linux.
Example
// Calculation loop
FOR i = 1 to 10000
CalculationProcedure(i)
// Give control back to the system in order to display the results
Multitask()
END
// Wait 1 second
Multitask(100)
Syntax
Multitask([<Timeout>])
<Timeout>: Optional integer or optional Duration
  • Define a timeout: <Timeout> = positive integer.
    The execution of the application is interrupted during <Timeout> hundredths of a second without giving control back to the system. The mouse clicks and the actions performed on the keyboard keys are ignored by the application. For example, the window can be moved but it cannot be resized.
    The optional processes of controls are always run.
    Note: If <Timeout> = 1, the application gives control back to Windows without waiting during 1 hundredth of a second.
    Java The modification of window size is not ignored. On the contrary, the mouse clicks and the actions on the keyboard keys are ignored.
    Linux The positive values are not allowed.
  • Giving control back to Windows: <Timeout> = 0 or is not specified.
    Windows ends the current processes, gives control back to the WINDEV application, then takes into account the mouse clicks and the actions performed on the keyboard keys.
    Java Multitask has no effect if <Timeout> = 0.
  • Give control back to Windows and to the WLanguage: <Timeout> = negative integer.
    The execution of the application is interrupted during <Timeout> hundredths of a second. Other processes can be run during this time period (redisplaying or running a click code for example). The interactions with the users (mouse click, keystroke, ...) are processed as usual.
    Note: If <Timeout> = -1, the application gives control back to Windows without waiting during 1 hundredth of a second.
Note: This parameter can correspond to:
  • an integer corresponding to the number of hundredths of a second,
  • a Duration variable,
  • Versions 23 and later
    the direct indication of the duration ('1s' or '10cs' for example).
    New in version 23
    the direct indication of the duration ('1s' or '10cs' for example).
    the direct indication of the duration ('1s' or '10cs' for example).
Remarks
WINDEV

Example of timeout

The user presses the Esc key before or during the call to Multitask:
  • if <Timeout> is positive: The Esc key is ignored.
  • if <Timeout> is equal to 0: The Esc key is taken into account at the end of current WINDEV processes.
  • if <Timeout> is negative: The Esc key is immediately taken into account.

Tips

  • To refresh the display, we recommend that you use MultitaskRedraw.
  • The events and timers started before the execution of Multitask are managed during the timeout.
  • In a Service application, Multitask must be replaced by ServiceWait.

Note

We recommend that you use ThreadPause instead of Multitask or Timeout when several threads are used (including for the main application thread) if the user actions do not have to be processed by the timeout.
Component : wd240obj.dll
Minimum version required
  • Version 9
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