Confirm (Function)

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Standard functions

Windows management functions

Dialog Box functions

WLanguage procedure

Confirm

Presentation

Example

Features of the dialog box

Line break in the dialog box

Miscellaneous

Emulation

Application in the background: Specific case from Android 10

See also

Confirm (Function)

In french: Confirmer

Displays a message in a standard dialog box that proposes "Yes", "No", "Cancel" and returns the user's choice.

Remarks:

This is a modal warning window. To continue running the application, the user must validate one of the buttons.
To avoid blocking the application, use ConfirmAsynchronous.
WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.

Example

Res is int
NextTitle("Modifying the form")
Res = Confirm("Some modifications have been made to the form.", ...
"Do you want to save them before you close the form?")
SWITCH Res
CASE Yes: SaveForm() // Backup process
CASE No: Close()
CASE Cancel: SetFocusAndReturnToUserInput()
END

Res is boolean
Res = Confirm("Do you want to load this page?")
IF Res = True THEN
// User validation
ELSE
// No user validation
SetFocusAndReturnToUserInput("VALIDBTN")
END

Syntax

Displaying a Confirm dialog box Hide the details

<Result> = Confirm([<Selected button>, ] <Text> [, <Line 2> [... [, <Line n>]]])

<Result>: Integer constant

Identifies the button selected by the user:
No 0 The user selected [NO].
Yes 1 The user selected [YES].
Cancel 2 The user selected [CANCEL].

<Selected button>: Optional integer constant

Button selected by default in the dialog box:
No 0 selected by default.
Yes
(Default value) 1 selected by default.
Cancel 2 selected by default.

<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 a Confirm dialog box on the browser Hide the details

<Result> = Confirm(<Text> [, <Line 2> [... [, <Line n>]]])

<Result>: Boolean

True if the user validated,
False otherwise.

<Text>: Unicode string

Text to display.

<Line 2>: Optional Unicode character string

Text displayed on the second line.

<Line n>: Optional Unicode character string

Text displayed on the Nth line.

Remarks

Features of the dialog box

The message is aligned to the 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 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.

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.

To customize this dialog box (and all the system dialog boxes in your site), check "Apply the skin to the dialog boxes (YesNo and OKCancel)" in the "Skin" tab of the project description window.

Line break in the dialog box

The CR string (Carriage Return) can be used to force a break to the next line. For example:

Confirm("The XXX form was modified." + CR + ...
"Do you want to save it before exiting?")

is equivalent to:

Confirm("The XXX form was modified.", ...
"Do you want to save it before exiting?")

You also have the ability to use the syntax of multiline strings. For example:

Confirm(
[
The XXX form has been modified.

Do you want to save changes before closing?
])

Miscellaneous

Timers (TimerSys) are not stopped when this function is called.
Windows events are not stopped when this function is called.
You can use the code wizard to enter the function in the code editor. Depending on the characteristics entered in the wizard, the function used can be different in the code that is automatically generated.
DelayBeforeClosing limits how long the message is displayed. The dialog box is automatically closed. For question or confirmation dialog boxes, the default button corresponds to the expected answer.
The text of the buttons is displayed in the system language.
If your project uses pre-launched sessions, this function must not be used in the "Initializing" event of the project. It must be used in the event "Initializing the project after connection to the site".
This function must not be used:
- in the event "Resizing" of the window. Otherwise, the application will be locked.
- in the event "Changing the orientation" of the window.
- in the event "Move to the foreground" associated with the project.
  Remark: However, the function can be used in the event "Move to the foreground" of a window.
- in a thread.

Emulation

A confirmation message can be emulated by EmulateConfirm.

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.

Confirm 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.

For more details, see Android 10: Behavior of applications in the background.

Component: wd270obj.dll