YesNo (Function)

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Features of the dialog box
Line break in the dialog box
Miscellaneous
Application in the background: Specific case from Android 10

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YesNo (Function)

In french: OuiNon

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

Remarks:

This is a blocking dialog box. To continue running the application, the user must validate one of the buttons.
To avoid blocking the application, use YesNoAsynchronous.

Example

// Exit choice
IF YesNo("Do you want to exit the program?") = Yes THEN
Close()
END

Syntax

Displaying a Yes/No dialog box Hide the details

<Result> = YesNo([<Selected button>, ] <Text> [, <Line 2> [... [, <Line N>]]])

<Result>: Integer constant

Identifies the button selected by the user:
No (or 0) The user selected [NO]
or closed the dialog box via the 'X' icon.
Yes (or 1) The user selected [YES]

<Selected button>: Optional integer constant

Button selected by default in the dialog box:
No (or 0) The "No" button is selected by default.
Yes (or 1)
(Default value) The "Yes" button is 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.

Remarks

Features of the dialog box

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.

The message is aligned to the left.
The captions of buttons depend 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) 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:

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

is equivalent to:

YesNo("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:

YesNo(
[
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.
The text of the buttons is displayed in the system language.
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.
The position of the buttons varies according to the Android version. From Android 4.1, the system sets the validation button on the right. Dialog is used to define the position of the buttons, if necessary.

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.

YesNo 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.

Business / UI classification: UI Code

Component: wd290obj.dll