According to this thread of MSDN, it is possible but it seems to be quite complex since you would have to compile the code to an assembly, in order to execute strings as code.
Are you sure that you cannot use a regular function?
Thank you for an answer.
It is understood that I cannot call for a general function.
please tell me the condition of ProcessBooK from an external system what kind of technique.
For example, I use SendKeys or SendMessage after ProcessBook start