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  • Features of the dialog box
  • Line break in the dialog box
  • Displaying the dialog box
  • Miscellaneous
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Stored procedures
Displays a custom message in a system warning window.
Example of warning
  • This is a modal warning window. To continue running the application, the user must validate this window by clicking OK.
  • WEBDEV - Server code This function displays a modal dialog box.
Warning("This operation was not validated" + ...
CR + "Contact the application manager")
Warning(<Text> [, <Line 2> [... [, <Line n>]]])
<Text>: Character string
Text to be displayed on the first line.
<Line 2>: Optional character string
Text to be displayed on the second line.
<Line n>: Optional character string
Text to be displayed on the Nth line.

Features of the dialog box

  • The title of the dialog box corresponds to the title of the current window (or page).
  • 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 (exclamation mark in yellow triangle) cannot be modified.

Line break in the dialog box

The CR string (Carriage Return) can be used to force a break to the next line. For example:
Warning("The XXX form was modified" + CR + ...
"Any new modification must be validated.")
is equivalent to:
Warning("The XXX form was modified", ...
"Any new modification must be validated.")
You also have the ability to use the syntax of multiline strings. For example:
This operation was not validated.
Contact the application provider
WEBDEV - Server code

Displaying the dialog box

The dialog box is a modal window. The dialog box is displayed in the center of the page, with a DDW effect (Dim Disabled Windows).
Warning uses the "WebDeVYesNo" internal page. To include this page in your project:
  1. Click in the quick access buttons.
  2. The creation window appears: click "Page" then "Page".
  3. In the "Internal Page" tab, select the internal page named "Yes/No".
  4. Validate. The "WebDeVYesNo" page appears in the editor.
  5. Save the page by keeping its default name.


  • 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.
Business / UI classification: UI Code
Component: wd270obj.dll
Minimum version required
  • Version 9
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