[pedrozzz]

В 2009 можно при помощи .Net API:

static void changeKeybordLayout(Args _args)
{
    #IsoCountryRegionCodes

    System.Windows.Forms.InputLanguage  tempLanguage = System.Windows.Forms.InputLanguage::get_CurrentInputLanguage();
    System.Windows.Forms.InputLanguage  ruLanguage   = System.Windows.Forms.InputLanguage::FromCulture(New System.Globalization.CultureInfo(#isoRU));
    ;
    
    System.Windows.Forms.InputLanguage::set_CurrentInputLanguage(ruLanguage);
    //теперь раскладка русская
    //..
    //восстанавливаем исходную раскладку
    System.Windows.Forms.InputLanguage::set_CurrentInputLanguage(tempLanguage);
}