To replace a string within specified files in a path, use ReplaceInFiles Method.
The following example demonstrates how to replace <H3> ... </H3> in a HTML file with <H4> ... </H4>.
editor.ReplaceInFiles( "<H3>(.*?)</H3>", "<H4>\\1<H4>", "C:\\web\\*.htm", eeFindReplaceRegExp
| eeReplaceBackup, eeEncodingSystemDefault, "*.bak", "C:\\Backup" );
editor.ReplaceInFiles "<H3>(.*?)</H3>", "<H4>\1<H4>", "C:\web\*.htm", eeFindReplaceRegExp
Or eeReplaceBackup, eeEncodingSystemDefault, "*.bak", "C:\Backup"