Afternoon all, I have a vb wpf application that opens a text file when you double click it in explorer (using command line args) my question is when I select multiple files and select open it opens separate instances for each file and only passes one command line arg to each application. I'm assuming the way to resolve this is to make the application a single instance application but I'm struggling with finding a solution to this, I dont really want to reference any winforms dlls if possilbe Thanks