You can use labview, visual basic / C platforms / programs to very easily create one. Follow the lock-in amp manual external commands examples. As you are using SR830 -- you will find information on this on stanford research web page: www.thinksrs.com
Dear Ali, You can use many software as Palash has said. However, I am suggesting LabVIEW because through GPIB-USB connection you can control and operate your lock in easily. Which I am using it to control my 7280 DSP LOCK IN AMPLIFIER.
I need a software that can help to control the lock in amplifier from the computer. From where I can get this software? and if any one has instruction about installing this softwear.? thank you