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Help / WLanguage / WLanguage functions / Standard functions / Windows functions / Dialog Box functions
  • Features of the dialog box
  • Line break in the dialog box
  • Special cases
  • Application in the background: Specific case from Android 10
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Stored procedures
Displays a non-blocking custom message in a system information window.
System information window
Remarks:
  • This is a non-blocking information window. The WLanguage code that follows the call to InfoAsynchronous continues to run. To close the window, the user must click the OK button to validate. When the user clicks "OK", the code of a WLanguage procedure can be run.
  • In the WLanguage code following the call to the function, another modal window cannot be opened before closing the dialog box.
  • WINDEV WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.
Example
User_Name is string
User_Name = "Florence"
InfoAsynchronous("Hello" + User_Name + CR + "Welcome!", MyProcedure_Info)

INTERNAL PROCÉDURE MyProcedure_Info()
ToastDisplay("Close info")
END
Syntax
InfoAsynchronous(<Text> [, <WLanguage procedure>])
<Text>: Character string
Text to display.
<WLanguage procedure>: Optional name of procedure or lambda procedure
Name of the WLanguage procedure ("callback") called when the user clicks "OK" in the information window.
This WLanguage procedure can correspond to:
  • a name of a global procedure,
  • a name of an internal procedure,
  • a lambda procedure.
If this parameter is not specified, no procedure is run when the user clicks "OK" in the information window.
Remarks

Features of the dialog box

  • The title of the dialog box corresponds to the title of the current window (or page).
    AndroidiPhone/iPad To comply with the system specifications, the title of dialog box is empty by default. To define this title, use NextTitle.
  • To modify or define the title of dialog box, use NextTitle.
  • The message is aligned to the left.
  • The captions of buttons depend on the runtime language of Windows.
  • The maximum number of characters cannot exceed 4096. If a larger string is passed as parameter, it will be truncated.
    Android The entire string is displayed, regardless of its size.
  • The icon displayed (information tooltip) cannot be modified.
WINDEV To customize this dialog box (and all the system dialog boxes in your application), check "Customize system windows (Info, YesNo, Confirm, Dialog)" in the "Style" tab of the project description. For more details, see Customizing dialog boxes.

Line break in the dialog box

The CR string (Carriage Return) can be used to force a break to the next line. For example:
InfoAsynchronous("The XXX form was modified." + CR + "This form will be saved.")
You also have the ability to use the syntax of multiline strings. For example:
InfoAsynchronous(
[
The XXX form has been modified.

This form will be saved.
])

Special cases

  • Timers (TimerSys) are not stopped when this function is called.
  • WINDEV Windows events are not stopped when this function is called.
  • The text of the buttons is displayed in the system language.
  • iPhone/iPad This function must not be used:
    • in the "Resize" event of the window. Otherwise, the application will be locked.
    • in the "Change the orientation" event of the window.
    • in the "Move to the foreground" event associated with the project.
      Remark: However, the function can be used in the "Move to the foreground" event of a window.
    • in a thread.
Android

Application in the background: Specific case from Android 10

From Android 10, it is no longer possible to open a window when the application is in the background.
InfoAsynchronous can open a window. If this function is used while the application is in the background, a fatal error will occur.
Tips:
  • It is possible to determine if the application is in the background using InBackgroundMode.
  • If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). The application will be brought back to the foreground when the notification is clicked, if the ActivateApplication property is set to True. You can also open a window from the procedure passed to the ActionClick property.
Component: wd290obj.dll
Minimum version required
  • Version 25
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Last update: 02/28/2024

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