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  • Features of the dialog box
  • Line break in the dialog box
  • Miscellaneous
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Stored procedures
Displays a non-blocking message in a standard dialog box with the answers "Yes", "No", "Cancel" and calls a WLanguage procedure with the user's response.
Confirmation example
  • This is a non-blocking dialog box. The WLanguage code that follows the call to ConfirmAsynchronous continues to run. To close the window, the user must validate one of the buttons. When the user clicks one of the buttons, the code of a WLanguage procedure is run.
  • In the WLanguage code following the call to the function, another modal window cannot be opened before closing the dialog box.
NextTitle("Modifying the form")
ConfirmAsynchronous("Some changes have been made to the form.", ...
"Do you want to save them before closing the form?", ...
ProcessConfirmation(nResponse is int))
INTERNAL PROCEDURE ProcessConfirmation(nResponse is int)
SWITCH nResponse
CASE Yes: SaveForm() // Backup process
CASE No: Close()
CASE Cancel: SetFocusAndReturnToUserInput()
ConfirmAsynchronous([<Selected button>, ] <Text> , <WLanguage procedure>)
<Selected button>: Optional integer constant
Button selected by default in the dialog box:
No0selected by default.
(Default value)
1selected by default.
Cancel2selected by default.
<Text>: Character string
Text to display.
<WLanguage procedure>: Name of procedure or lambda procedure
Name of the WLangage procedure ("callback" procedure) called when the user clicks one of the buttons in the confirmation window. This procedure is used to find out which button was clicked, and to run a specific process if necessary.
For more details on this procedure, see Parameters of the procedure used by ConfirmAsynchronous.
This WLanguage procedure can correspond to:
  • a name of a global or local procedure,
  • a name of an internal procedure,
  • a lambda procedure.

Features of the dialog box

  • The message is aligned to left.
  • The captions of buttons depend on runtime language of Windows (or on the runtime language of browser for a WEBDEV site).
  • 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 a WINDEV application, question mark in a WEBDEV application) cannot be modified.
  • 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.

Line break in the dialog box

The CR string (Carriage Return) can be used to force a break to the next line. For example:
ConfirmAsynchronous("The XXX form was modified." + CR + ...
"Do you want to save it before closing?", Procedure_ConfirmAsynchronous)
You also have the ability to use the syntax of multiline strings. For example:
The XXX form has been modified.
Do you want to save changes before closing?
], Procedure_ConfirmAsynchronous)


  • Timers (TimerSys) are not stopped when this function is called.
  • The text of the buttons is displayed in the system language.
Component: wd270obj.dll
Minimum version required
  • Version 25
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