It is possible (but a bit tricky) to launch Origin by double-clicking on a *.DAT
file (an ASCII data file) and then have Origin automatically import the DAT
file. In order to do this you will need to complete the following three
steps:

1. In your Windows Explorer select View Options, Click on the File Types tab,
select the file extension DAT, click the Edit button, select open in the
Actions list box, click the Edit button, enter C:\Origin50\OpenDat.bat in the
Application used to perform action edit box, click OK and Close until you
return to the Windows Explorer.

2. Create the file OpenDat.bat in your C:\Origin50 folder and type in the
follow DOS batch commands:

@echo off
echo opendat=1;