Gaussian beam generation in DLL file without random seed

I have used Gaussian.dll in Non-sequential mode for my application (Stray Radiation in the Launcher). However, there is a problem because Gaussian.dll can only generate the ray bundle with random seed (Stray radiation shows different results in each of calculation). Can I use Gaussian.dll without random seeds? Another option is the generation of Gaussian source using a source file but I also failed to find the direction cosine of the Gaussian beam.