I recently helped someone who wanted to open an external editor from Visual Studio. Below are the steps I suggested to map a keyboard shortcut to open Notepad++ to the same line/column cursor position as the Visual Studio editor was at.
You can get a solution to this that takes 2 steps, both of which take little time once you have your search results.  Double-click the result, press ctrl-shift-alt-L (can be changed of course).
The steps below are verbose to show as much as possible so everyone can understand the steps and modify accordingly.
Create a cmd file that will launch notepad++ with file, line, and column arguments
Save the code below in d:\util\startnppwith3args.cmd
setlocal
set _file=%0
set _line=%1
set _column=%2
set _line=%_line:"=%
set _column=%_column:"=%
: remember to use "" as first arg as blank title so we call npp properly :)
start "" "F:\Program Files (x86)\Notepad++\notepad++.exe" -multiInst -nosession -n%_line% -c%_column% %_file%
pause
endlocal
Create external tool to call startnppwith3args.cmd
tools | External Tools…

Remember the position of this command, 3 in this case.
Create a keyboard shortcut to “command3”
tools | Options | Keyboard and search for externalcommand

Assign your desired key combination to this command ctrl-shift-alt L for example.
Verify your command is as expected on the Tools menu

Now put it all into action
- Open a file in Visual Studio
- Search for something in the file
- Double-click desired search result
- Press ctrl-shift-alt L
Notepad++ opens up the file on the line and column for the search result!

What’s left?
- Take the pauseout of the cmd file as it was used just for debugging purposes.
- decide if you want -multiInst -nosessionarguments
- Take a look at Arguments for External Tools for all variables that are assigned when you launch an external tool.
Conclusion
This was in interesting question, and an area I had not explored before.  I might use this technique myself and for other purposes.