DllImport vs autiot DllOpen

[JohnOne]

Wernt quite sure where to put this, so here it is.

Can anyone tell me about the nature of dllimport, I mean once the dll is imported is it like autoits dllopen in any fashion?

Let me try to explain, If my dll has a conditional statement attached to ul_reason_for_call and I use autoit to access a function in that dll, then the conditional statement is only checked when I use dllopen, and I'm free to then call its functions without the conditions being checked if I use the handle returned by DllOpen. If I just use the filename the condition is checked upon each call to a function in the dll.

My question is, what is the behaviour of a call to an external dll function when being used from C#?

[Richard Robertson]

In .Net, once a library has been loaded via DllImport, it remains loaded until the Application Domain is closed. If you don't know what Application Domains are, then you aren't modifying them and they close when your application ends.

[JohnOne]

Thank you, thats the answer I was hoping for.

[JohnOne]

Another question regarding this subject if someone knows.

When you import multiple functions from same external library (for instance autoitx3), is an instance of the library loaded for each function?

[Richard Robertson]

Single instance is loaded.

[JohnOne]

Great, Thanks again Richard Robertson.

[mailro]

Can someone give a sample code how to import multiple functions from same DLL?