How to call an vb6.0 exe file from c#.net windows applicaion

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C#

I have an vb6.0 application and need to call it from c#. Process.start works fine for this but is very slow for each call. Is it possible to load vb6.0 exe when c# application is loaded at first time and execute when necessary in order to avoid that delay.
Actually data communications between application is not the issue. Just need to call a vb6 exe (GUI) file from c# application. Even a simple vb6 form (exe), when calling from Visual studio (c# win application) takes minimum 4 seconds to load the form using proccess.start()

What I have tried:

MyvbApplication.StartInfo.FileName = "MEDICURE.exe";
MyVbapplicatkion.StartInfo.Arguments = "PatientRegistration";
MyVbApplication.StartInfo.CreateNoWindow = true;
MyVbApplication.Start();