Can you use .net 3.5 Action or Func as Marshalled unmanaged delegates?

Question

After reading Dynamically calling unmanaged dlls in .net

I've been trying to modify the code to my liking. I made a class that implements idisposable to wrap load calls in and free them when needed. However I can't seem to figure out the syntax if it is possible to use anonymous delegates with it.

var loaded=DynamicLibraryLoader.TryLoad("User32.dll");
var beeper=loaded.GetProcAddress("MessageBeep");
var type=typeof(Action<UInt32>);
Action<UInt32> beepAction2=(Action<UInt32>) Marshal.GetDelegateForFunctionPointer(beeper,type);

The last line throws an argument exception saying that the specified Type must not be a generic type definition. Is there a way around this or do I have to provide a named delegate to do anything unmanaged?

For reference of any interested in what you can do by default in windows with unmanaged code - Link (create shortcuts,dynamically load a DLL)

score 1 · Accepted Answer · answered Aug 28 '09 at 16:57

1

As the exception indicates, you must use a non-generic delegate when converting a native function pointer to managed code.

answered Aug 28 '09 at 16:57

JaredPar

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so there's no syntax or way around it? – Maslow Aug 28 '09 at 17:15
@Maslow, no there is not at this time – JaredPar Aug 31 '09 at 20:53
I guess since there are no other answers, I'll accept the answer that just reads back to me what the exception says, I would have preferred some resources,reference or some type of workaround ideas. – Maslow Sep 07 '09 at 23:38
@Maslow, unfortunately there's not much more to give. It's simply an unsupported scenario at this point – JaredPar Sep 07 '09 at 23:47

Can you use .net 3.5 Action or Func as Marshalled unmanaged delegates?

1 Answers1

Linked