Compiling a Pattern
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To compile a pattern:

·Type your pattern in the Pattern Edit Box  
 
·Set any optional Compile Option and/or specify a Windows Locale string to set the current locale for character classification (default is to use the C locale which is limited to the ASCII set). [see the documentation of setlocale function in MSDN]  
 
·Press the Evaluate button to compile your pattern  

pattern_eval  

Upon successful compilation of the pattern, several bits of information about the compiled pattern are displayed in the bottom part of the page.

Pattern compilation errors are notified to the user using this dialog. The position and the reason of the failure are clearly displayed.

pattern_error