void Replace( 
   string text,
   int fromLine,
   int fromCharPos,
   int toLine,
   int toCharPos
)

Parameters

text

The text that replaces the existing text.

fromLine

The line in which the replacement starts.

fromCharPos

The character position at which the replacement starts in the first line, inclusive.

toLine

The line in which the replacement ends.

toCharPos

The character position at which the replacement ends in the last line, inclusive.