As in topic, i'm looking example how to call internal post web-service inside business process. Should i use "Script Task" or "Call Webservice Task" to handle it ?
You would use a script task, but you don't need to call it like a web service. Keep in mind, the web service is just a C# class in the Terrasoft.Configuration namespace. You can simply create an instance of the class, like you would any class, and invoke it's methods. The only thing you need to keep in mind is that how the service gets things like UserConnection will be different when used this way. For these cases, I usually have an overloaded constructor in the web service class where I provide the UserConnection to it
For example:
var myObj =new Terrasoft.Configuration.UsrSourceCode1(UserConnection);
myObj.SomeMethod();