如何在VBA中使用FileSystemObject替换文本文件行的字符串?

I am trying to use FileSystemObject methods to find a specific line in a text file, and within that line replace a specific string. I am relatively new to this, as my current code has excel open the text file and replace what I need it to replace then save and close it. This way is no longer an option, as having excel open the text file takes too long and holds up the file.I am trying to use FileSystemObject methods to