RegExpEval is a tool to verify your regular expression

• Line for "regular expression" should provide a history of last entered regular expressions.
• Implement help for PCRE.
• Read a file from disk.
• Insert searching in sample text.
• When select matches, scroll to position where match was found (it is important for large sampletext).
• When a capture gourp is marked, this line should persist marked, when just sample text is changed.