Call up application from context menu (on multiple selected files)

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'MyApp.exe "%1"'

This works with single file, but when I select multiple files and do
"Open with MyApp", what happened is that each selected file will trigger the
startup of 1 MyApp, with argument to MyApp as only containing filename of 1
of the selected files.
Instead, I want to have the behavior as only 1 single MyApp will be
triggerred, and the list of filename of selected files will be its argument.

Posted 5-Sep-13 20:08pm

Jadhav Gangadhar

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-09-05T20:32:00

In this question, you are mixing two different aspects: command line parameters, and single-instance application.

There are different methods of preventing multiple application instances from running (second instance is started for short time, detects the first instance and terminates itself immediately), but I developed a very compact, simple and robust mechanism where the same technique is used for detection of the previous instance and sending information on the command line. Please see my past answers:
http://www.codeproject.com/Answers/556737/Enterplusmultiplepluscommandsplustoplusonlyplusone#answer1[^],
http://www.codeproject.com/Answers/593594/CustomplusWindowsplusright-clickpluscommandpluslau#answer1[^].

As to the processing of a command line, I would recommend my own library which is very easy to use and flexible enough; I explain it in my CodeProject article: Enumeration-based Command Line Utility[^].

In this article, I also recommend another, more complex solution, which is also published in CodeProject.

—SA