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Help / WLanguage / WLanguage functions / Standard functions / Windows functions / Dialog Box functions
  • Features of the dialog box
  • Line break in the dialog box
  • Displaying the last error message
  • Miscellaneous
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Stored procedures
Displays a custom error message in a system error window.
Error message
Remarks:
  • This is a modal warning window. To continue running the application, the user must click "OK".
Example
Reports and QueriesWindows
NextTitle("Error: Unknown customer")
Error("This customer code does not exist. It must be created beforehand")
Syntax

Displaying a custom error message Hide the details

Error(<Text> [, <Line 2> [... [, <Line n>]]])
<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.
Reports and Queries

Displaying the error message of the last WLanguage function used

Error()
Remarks

Features of the dialog box

  • 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.
  • The message is aligned to the 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 as parameter, it will be truncated.
  • The icon displayed (white cross) 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:
Error("An error was detected while entering the address." + CR + ...
"Please modify the customer details.")

is equivalent to:
Error("An error was detected while entering the address. ", ...
"Please modify the customer details.")
You also have the ability to use the syntax of multiline strings. For example:
Error(
[
An error was detected while entering the address.

Please modify the customer details.
])
Reports and Queries

Displaying the last error message

Calling Error without any parameters (syntax 2) displays the error message of the last WLanguage function that triggered an error.
In this case, the following code:
Error()
is equivalent to:
Error(ErrorInfo())
Caution: Error must be used immediately after the call to the function that failed. If a WLanguage function is called, it may reset and change the error report returned by Error.

Miscellaneous

  • Timers (TimerSys) are not stopped when this function is called.
  • The caption of the button is displayed in the language used by Windows on the current computer.
Business / UI classification: UI Code
Component: wd290obj.dll
Minimum version required
  • Version 9
This page is also available for…
Comments
Exemplos Error
Exemplos Error

NextTitle("Erro 1")
Error("Um Erro de Teste")
s_descricao_erro is string="isso complemento erro"
NextTitle("Erro 2")
ErrorBuild("O %1 foi de teste",s_descricao_erro)
NextTitle("Erro 3")
ErrorWithTimeout(500,"O erro com tempo ")

//Blog com Video e Exemplo
http://windevdesenvolvimento.blogspot.com.br/2016/07/curso-windev-funcoes-dialogo-7-error.html
https://www.youtube.com/watch?v=aMP2CoIM5Wo
De matos AMARILDO
15 Jul. 2016

Last update: 02/28/2024

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