If I launch any ehe file so a blender hangs completely.
Why does he hang?
How else to start the program with the transmission of the parameter for it, but so that the blender is not a VIS?
I think that is the expected behavior for Python (not only in Blender). It blocks any execution of Blender internal things like UI updates etc. Thus, if your external program takes a significant amount of time to run then you might want to check e.g. in this discussion for ideas to workaround: