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Help / WLanguage / WLanguage functions / Standard functions / Windows functions / Dialog Box functions
  • Features of the dialog box
  • 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.To close the window, the user must click OK.
Example
Universal Windows 10 AppAndroidiPhone/iPad
NextTitle("Error: Unknown customer")
ErrorBuild("The %1 code does not exist. It must be created.", cCustomerCode)
Syntax
ErrorBuild(<Format string> [, <Parameter 1> [... [, <Parameter N>]]])
<Format string>: Character string
Character string to display containing optional parameters (%1 to %n). To display the % character, this character must be typed twice (%%).
<Parameter 1>: Optional character string
First parameter that will be inserted into the formatted character string.
<Parameter 1> will replace the %1 character, <Parameter 2> will replace the %2 character, etc.
The number of specified parameters must be equal to or greater than the number of parameters used in <Format string>.
If <Format string> contains more parameters, the additional parameters will be replaced with empty strings.
<Parameter N>: Optional character string
Nth parameter that will be inserted into the formatted character string.
<Parameter 1> will replace the %1 character, <Parameter 2> will replace the %2 character, etc.
The number of specified parameters must be equal to or greater than the number of parameters used in <Format string>.
If <Format string> contains more parameters, the additional parameters will be replaced with empty strings.
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 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.

Miscellaneous

  • Timers (TimerSys) 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.
  • 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.
ErrorBuild 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 15
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Last update: 02/28/2024

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