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  • Characteristics of dialog box
  • Line break in the dialog box
  • Various
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Stored procedures
Displays a message in a standard dialog box that proposes "OK" and "Cancel" and returns the user's choice.
To close the window, the user must validate one of the buttons.
Versions 15 and later
Android This function is now available for Android applications.
New in version 15
Android This function is now available for Android applications.
Android This function is now available for Android applications.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Example
AndroidiPhone/iPadWindows MobileUniversal Windows 10 App
// Delete a line with confirmation (yes by default)
IF OKCancel("Delete this record?") THEN
HDelete(CUSTOMER)
END
AndroidiPhone/iPadWindows MobileUniversal Windows 10 App
// Choice used to exit from the program
IF OKCancel("Do you want to exit from the program?") = Yes THEN
Close()
END
AndroidiPhone/iPadWindows MobileUniversal Windows 10 App
// Ask to confirm the deletion of the file whose
// name is found in the FILE_NAME variable, with
// positioning on the "No" button in the OKCancel window
IF OKCancel(No, "Delete the file?") THEN
fDelete(FILE_NAME)
END
Syntax
AndroidiPhone/iPadUniversal Windows 10 App

Displaying an OK/Cancel dialog box Hide the details

<Result> = OKCancel([<Selected button>, ] <Text> [, <Line 2> [... [, <Line N>]]])
<Result>: Boolean
Identifies the button selected by the user:
FalseThe "Cancel" button was chosen by the user.
TrueThe "OK" button was chosen by the user.
<Selected button>: Optional boolean
Button selected by default in the dialog box:
No"Cancel" button selected by default.
True
(by default)
"OK" button selected by default.
<Text>: Character string
Text to display.
<Line 2>: Optional character string
Text displayed on the following lines.
<Line N>: Optional character string
Text displayed on the following lines.
Remarks

Characteristics of dialog box

  • The title of the dialog box corresponds to the title of the current window (or page).
    iPhone/iPad To comply with the system specifications, the title of dialog box is empty by default. To define this title, use NextTitle. AndroidiPhone/iPad 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 captions of buttons depend 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) cannot be modified.

Line break in the dialog box

CR (Carriage Return) can be used to force a break to the next line. For example:
IF OKCancel("Caution: you are going to delete this record" + CR + ...
"Do you want to continue?") THEN
HDelete(CUSTOMER)
END
is equivalent to:
IF OKCancel("Caution: this record will be deleted", ...
"Do you want to continue?") THEN
HDelete(CUSTOMER)
END
AndroidiPhone/iPadWindows MobileUniversal Windows 10 App

Various

  • The timers (TimerSys) are not stopped during the call to this function.
  • Windows Mobile DelayBeforeClosing limits the time required to display 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 buttons is displayed in the language used by Windows on the current computer.
  • iPhone/iPad This function must not be used:
    • in the window "Resizing" event. Otherwise, the application will be locked.
    • in the window "Changing of orientation" event.
    • in the "Placing in foreground" event associated with the project.
      Note: However, the function can be used in the window "Placing in foreground" event.
    • in a thread.
Component : wd240obj.dll
Minimum version required
  • Version 9
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Comments
Exemplo OkCancel
Exemplo OkCancel

IF OKCancel("Vamos Gravar") THEN
//Comandos
Info("Comandos")
END

//Blog com Video e exemplo
http://windevdesenvolvimento.blogspot.com.br/2016/07/curso-windev-funcoes-dialogo-2-okcancel.html
https://www.youtube.com/watch?v=ECbkPsdEoIY
De matos AMARILDO
10 Jul. 2016