event from c# dll not fired from excel VBA call -


i have dll written in c# , code work on dev pc.

[guid("a125ae08-682e-46cb-9a9e-52dd70021d80")] [comvisible(true), interfacetype(cominterfacetype.interfaceisidispatch)] public interface imyevents {     [dispid(1)]     void onevent();         }  [guid("fb9be25d-5012-44d7-8d66-221c3343e19e")] [comvisible(true), interfacetype(cominterfacetype.interfaceisidispatch)] public interface imyclass {     [dispid(2)]     int sum(int x, int y);      [dispid(3)]     void starttimer();    }  [guid("bd40af0a-ac44-4ffe-88a7-9bd4f77a9790")] [comvisible(true)] [classinterface(classinterfacetype.none)] [comsourceinterfaces(typeof(imyevents), typeof(imyclass))] public sealed class testforvba:imyclass, imyevents {     public delegate void timerevent();       public event timerevent onevent;      public int sum(int x, int y)     {         return x + y;     }        void imyevents.onevent()     {      }      public void starttimer()     {          timer t = new timer();         t.interval = 5000;         t.elapsed += (s, a) =>         {             onevent?.invoke();          };         t.start();      }         }

dll , com registered use regasm.exe , call excel vba

public withevents b testforvba private sub b_onevent() msgbox "event left fired" end sub private sub commandbutton1_click()     set b = createobject("testforvba")      msgbox b.sum(5, 10)      msgbox "timers event fire starting..."     call b.starttimer   end sub

all code (c# , vba) work on dev pc when copy excel file , dll user pc , run vba code see message b.sum(5, 10) message fired event didn't display.


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