C#
Regex regexObj = new Regex("wzorzec wyraenia regularnego",
    RegexOptions.IgnorePatternWhitespace | RegexOptions.IgnoreCase |
    RegexOptions.Singleline | RegexOptions.Multiline);


VB.NET
Dim RegexObj As New Regex("wzorzec wyraenia regularnego",
    RegexOptions.IgnorePatternWhitespace Or RegexOptions.IgnoreCase Or
    RegexOptions.Singleline Or RegexOptions.Multiline)


Java
Pattern regex = Pattern.compile("wzorzec wyraenia regularnego",
    Pattern.COMMENTS | Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE |
    Pattern.DOTALL | Pattern.MULTILINE);


JavaScript
var myregexp = /wzorzec wyraenia regularnego/im;

var myregexp = new RegExp(userinput, "im");


PHP
regexstring = '/wzorzec wyraenia regularnego/simx';


Perl
m/regex pattern/simx;


Python
reobj = re.compile("wzorzec wyraenia regularnego",
    re.VERBOSE | re.IGNORECASE |
    re.DOTALL | re.MULTILINE)


Ruby
myregexp = /wzorzec wyraenia regularnego/mix;

myregexp = Regexp.new(userinput,
    Regexp::EXTENDED or Regexp::IGNORECASE or
    Regexp::MULTILINE);
