Warning (Function)

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Characteristics of dialog box
Line break in the dialog box
Miscellaneous
Emulation
Application in the background: Android 10 specific case

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Warning (Function)

In french: Avertissement

Displays a custom message in a system warning window.

Remarks:

This is a blocking warning window. To continue running the application, the user must validate this window by clicking OK.
Versions 25 and later
To avoid blocking the application, use WarningAsynchronous.
New in version 25
To avoid blocking the application, use WarningAsynchronous.
To avoid blocking the application, use WarningAsynchronous.
WINDEV allows you to apply the skin template of your project to this dialog box. See Customizing dialog boxes for more details.

Versions 15 and later

This function is now available for Android applications.

New in version 15

This function is now available for Android applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

NextTitle("Caution")
Warning("This operation was not validated" + ...
CR + "Contact the application manager")

Syntax

Warning(<Text> [, <Line 2> [... [, <Line n>]]])

<Text>: Character string (with quotes)

Text that will be displayed on the first line.

<Line 2>: Optional character strings (with quotes)

Text that will be displayed on the second line.

<Line n>: Optional character strings (with quotes)

Text that will be displayed on the other lines.

Remarks

Characteristics of 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 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 in parameter, it will be truncated.
The icon displayed (exclamation mark in yellow triangle) cannot be modified.

To customize this dialog box (as well as all system dialog boxes of your application), check "Customize the system windows (Info, YesNo, Confirm, Dialog)" in the "Style" tab of the project description. See Customizing dialog boxes for more details.

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:

Warning(
[
This operation was not validated.

Contact the application provider
])

Miscellaneous

Timers (TimerSys) are not stopped when this function is called.
Windows events are not stopped when this function is called.
When typing the function in the code editor, you have the ability to use the code wizard. Depending on the characteristics entered in the wizard, the function used can be different in the code that is automatically generated.
DelayBeforeClosing is used to limit the display duration of the message. The dialog box is automatically closed. For the question or confirmation dialog boxes, the expected answer corresponds to the default button.
The caption of the button is displayed in the language used by Windows on the current computer.

Emulation

A warning message can be emulated by EmulateWarning.

Versions 25 and later

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

Warning 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). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

New in version 25

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

Warning 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). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

Warning 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). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

Business / UI classification : UI Code

Component : wd250obj.dll