How to send arguments to a process that started before?

How do I send arguments to a process that started before?

Suppose we started process "Name.开发者_JAVA技巧exe" before, and we know its process ID is X. In order not to open a new process, I want to send an argument to this process. How can I do this?

What is the most secure way so I will find the date received from my application, not hackers?

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It depends on how this process reads these parameters (its protocol for inter-process comunications).

• If it uses named pipes - use pipes.
• If it watches for certain files - create files and write to them
• If it uses sockets - use sockets to operate
• If it listens for queue - use MSMQ or other API for queueing

For example, you can start from Choosing a Transport (MSDN).

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In addition to the above:

1. Named mutex
2. WCF service
3. Database