this time....

i m looking to open a txt file and then search a line "Content-Disposition: inline" and then after this all text will be added to Text1 ( text area ) until the line says '------=_Part_'

Note : ------=_Part_ is not a complete line so i need it to search this word in line only....

Means :

i need all text to be added between line says 'Content-Disposition: inline' and line says'------=_Part_'