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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
  • Displaying the last error message
  • Miscellaneous
  • Application in the background: Specific case from Android 10
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Stored procedures
Displays a custom error message in a system error window for a set amount of time. After the timeout, the system window is automatically closed.
Remarks:
  • This warning window blocks the application until the time limit has elapsed. To continue running the application, the user must click "OK".
    WINDEVAndroid To avoid blocking the application, use ErrorWithTimeoutAsynchronous.
  • WINDEV WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.
Example
// Affiche "Une erreur a été détectée" dans une fenêtre d'erreur
// Cette fenêtre d'erreur se fermera automatiquement après 10 secondes.
ErrorWithTimeout(1000, "Une erreur a été détectée")
// Affiche la dernière erreur dans une fenêtre d'erreur 
// Cette fenêtre d'erreur se fermera automatiquement après 5 secondes.
ErrorWithTimeout(500)
Syntax

Displaying a custom error message Hide the details

ErrorWithTimeout(<Timeout> , <Text> [, <Line 2> [... [, <Line n>]]])
<Timeout>: Integer or Duration
Amount of time (expressed in hundredth of second) before automatically closing the error window. This parameter can correspond to:
  • an integer corresponding to the number of hundredths of a second,
  • a Duration variable,
  • the duration in a readable format (e.g., 1 s or 10 ms).
<Text>: Character string
Text to display.
<Line 2>: Optional character string
Text displayed on the second line.
<Line n>: Optional character string
Text displayed on the Nth line.

Displaying the error message of the last WLanguage function used Hide the details

ErrorWithTimeout(<Timeout before closing>)
<Timeout before closing>: Integer or Duration
Amount of time (expressed in hundredth of second) before automatically closing the error window. This parameter can correspond to:
  • an integer corresponding to the number of hundredths of a second,
  • a Duration variable,
  • the duration in a readable format (e.g., 1 s or 10 ms).
Remarks

Features of the dialog box

  • The title of the dialog box is the title of the current window. To modify this title, use NextTitle.
  • The message is aligned to the left.
  • The button caption depends 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.
  • The icon displayed (white cross) cannot be modified.
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:
ErrorWithTimeout(500, "Une erreur a été détectée lors de la saisie de l'adresse. " + CR + ...
	"Merci de modifier les données concernant le client.")
is equivalent to:
ErrorWithTimeout(500, "Une erreur a été détectée lors de la saisie de l'adresse. " , ...
	"Merci de modifier les données concernant le client.")
You also have the ability to use the syntax of multiline strings. For example:
ErrorWithTimeout(500,
[
Une erreur a été détectée lors de la saisie de l'adresse. 

Merci de modifier les données concernant le client.
])

Displaying the last error message

Calling ErrorWithTimeout by specifying only the timeout (syntax2), displays the error message of the last WLanguage function that triggered an error.
In this case, the following code:
ErrorWithTimeout(500)
is equivalent to:
ErrorWithTimeout(500, ErrorInfo())
Caution: The ErrorWithTimeout function must be used immediately after calling the failed function.. Indeed, calling a WLanguage function may reinitialize and modify the status report of ErrorWithTimeout.

Miscellaneous

  • Timers (TimerSys) are not stopped when this function is called.
  • Windows events are not stopped when this function is called.
  • The caption of the button is displayed in the language used by Windows on the current computer.
  • Equivalence: The ErrorWithTimeout is equivalent to function Error used with function DelayBeforeClosing.
    The following code:
    ErrorWithTimeout(1000, "Une erreur a été détectée")
    is equivalent to:
    DelayBeforeClosing(1000)
    Error("Une erreur a été détectée")
Android

Application in the background: Specific case from Android 10

Starting with Android 10, it is no longer possible to open a window when the application is in the background.
ErrorWithTimeout 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.
Business / UI classification: UI Code
Component: wd300obj.dll
Minimum version required
  • Version 18
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Last update: 03/27/2025

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