Quote Originally Posted by bismitapadhy View Post
In Qt 4.3.0 there is no function like FindBlockByLineNumber(int LineNo)
Please give me any other solution to findout.
Yes this function was introduced in Qt 4.5.
You can use
Qt Code: 
  1. QTextDocument::findBlock()
To copy to clipboard, switch view to plain text mode 
But this will only works for character position, not with line number.