The Windows Installer service uses the current user's language in all dialogs until a Windows Installer package is opened. On Windows 2000 and later operating systems, the Windows Installer determines this by using GetUserDefaultUILanguage. On operating systems earlier than Windows 2000, it uses GetUserDefaultLangID. When a Windows Installer package is opened, the installer displays dialogs using the package's language as specified by the Template Summary Property.
For more information about localizing the language of a Windows Installer package, see also A Localization Example.
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Build date: 8/13/2009
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