When you first install Entrian Source Search and enable it via Tools / Add-in Manager, it adds a new tool window to Visual Studio. It's a good idea to dock this along the bottom of your workspace.
Entrian Source Search builds a full-text index of all the text files in one or more folder trees - when you load a solution that it hasn't seen before, you tell it which root folder(s) to index.
Indexing happens automatically, first when you load a solution, and then when any of the files under your chosen root folders are changed (even if they are changed outside of Visual Studio). Irrelevant files like binary files and output files are excluded from the index. Binary files are excluded automatically, and there's a configurable list in More / Options of text file extensions to exclude.
You can start searching as soon as you like - even if not all of your files have been indexed yet, you can search those that have.
The main keyboard shortcuts are configurable - these are the defaults:
The three keys used here, =, [ and ] make a triangle on most Western keyboards. Note that if your keyboard has an AltGr key, you can use that as an alternative to the Alt key.
Here are some more shortcuts:
The search results show the folder and filename of each hit, along with the icon for that file type. The hits are syntax coloured - what you see is what you get.
The filename of the first hit in each file is shown in black, with subsequent hits from that file in gray. Likewise folders - the folder name of the first hit in each folder is black, with subsequent hits from that folder in gray.
Entrian Source Search makes Visual Studio faster and more
productive to use.
and try it for yourself.