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  • Overview
  • Defining the application language through programming
  • Default language
  • Changing the language through programming
  • Tip
  • Mechanism of preferred languages for the external components
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Stored procedures
Overview
A multilingual application is an application that can be distributed in several languages. The user will be able to choose the language used by the application at runtime. You can for example:
  • prompt the user to choose the runtime language the first time the application is started,
  • include an option (menu option or button for example) allowing the user to change the current application language.
Defining the application language through programming

Default language

When running the project, the default language is selected in the project options:
  • on the "Project" tab, in the "Project" group, click "Description".
  • select the "Language" tab.
  • select the default language in the list of project languages and select "Default language" from the popup menu.
The change of language is performed through programming.

Changing the language through programming

To change language through programming:
  1. Call Nation and pass the selected language as parameter. The selected language will be taken into account by the first WLanguage function called after Nation and for all the windows, pages and reports that will be opened thereafter.
  2. Call LoadError to load the message error file of the components (WD*.DLL files) in the selected language. The error message file has a WDM extension.
    Remarks:
    • If a message file is associated with the language chosen in the project description, there is no need to use LoadError.
      Reminder: The message file is defined in the "Various" tab of the project description.
      Reminder: to open the project description, go to the "Project" tab, "Project" group and click "Description". Select the "Language" tab.
    • The error messages of the components are in English by default. They can be translated with WDINT.EXE. WDINT is an additional tool. Contact PC SOFT Sales Department for more details about the conditions for using this product.
  3. If your application supports languages that use specific character sets (Greek, Korean, ...), you must change by programming:
Example of initialization process of project:
// The language is chosen via RADIO_ChooseLanguage
SWITCH RADIO_ChooseLanguage
CASE 1: // French
Nation(nationFrench)
CASE 2: // English
Nation(nationEnglish)
IF LoadError("ENGLISH.WDM") > 0 THEN
Error("Message file not found.",...
"The messages will be displayed in French.")
END
CASE 3: // Spanish
Nation(nationSpanish)
IF LoadError("SPANISH.WDM") > 0 THEN
Error("Message file not found.",...
"The messages will be displayed in French.")
END
CASE 4: // Greek
Nation(nationGreek)
IF LoadError("GREEK.WDM") > 0 THEN
Error("Message file not found.",...
"The messages will be displayed in French.")
END
ChangeCharset(charsetGreek)
ChangeKeyboard(charsetGreek)
END

Tip

Several methods can be used to choose the project language:
  • Stored in a parameter file. In this case, the change of language can be performed in the initialization process of the project and it will effective from the first window or page of the project.
  • Chosen by a menu option. In this case, the menu will be displayed in the default language and the change of language will be performed when the next window or page is opened.
Mechanism of preferred languages for the external components
Minimum version required
  • Version 9
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