I got a better idea.
Make a script (batch file) that starts the app that will get the data. You have to experiment with getting focus to the right field etc. If regular batch script can't accomplish that, I have a software saved somewhere that can be used to automate this.
Instal?SW-VMK-WIN?to execute that script. Then send the string either with DM USB or?CBL-USB-RS232KM-6.