c# - Unmanaged Exports and delegates -

c# - Unmanaged Exports and delegates -

i using robert giesecke unmanaged exports create .net wrapper dll utilize .net dll in delphi 7. works fine far, have function needs have callback/delegate.

how can done?

can give function pointer .net dll , phone call there , when yes how done?

it's pretty simple. define delegate type standard p/invoke.

here's simplest illustration can think of:

c#

using rgiesecke.dllexport; namespace classlibrary1 { public delegate int foodelegate(); public class class1 { [dllexport()] public static int test(foodelegate foo) { homecoming foo(); } } }

delphi

program project1; {$apptype console} type tfoodelegate = function: integer; stdcall; function test(foo: tfoodelegate): integer; stdcall; external 'classlibrary1.dll'; function func: integer; stdcall; begin result := 666; end; begin writeln(test(func)); end.

output

666

the default calling convention on c# side callingconvention.stdcall i've gone along that. that's obvious thing do.

c# delphi dll delphi-7