I want to be able to select a list with my program (located on my computer), push the "go" command button, and have my program to the following... if it finds a line in this txt document that has two or more underscores (__) in it (no matter where in the line), then add the whole line to a NEW text document... or, if the program has an underscore in the front (_) then add the whole line to the text document. OR if it has an underscore at the end (_) then add the whole line to the text document. So, for example, the text document will consist as follows:


asdfadsf_
asdfsdfdsf_346
_asdfasdf
asdfasd__235
asdfdsfasfd____2353


If that was what was in the text document, then it would take the following out and add them all to a new text document:

asdfadsf_
_asdfasdf
asdfasd__235
asdfdsfasfd____2353

EXCLUDING the asdfsdfdsf_346 as it does not follow what i wrote at the beginning... If anyone could help me write this then that would be great