I'll try to put it on the list again. I don't use any of those functions, but there is a way to do it somehow with delegates(the C# pointers). I use the API like this. I don't know much..3 months ago I didn't know anything about C# or FreeSwitch. Just have to read and try things since there aren't many C# examples out there. FreeSWITCH.Native.Api fsApi = new FreeSWITCH.Native.Api(); string filename; filename = @"E:\LiveMatch\Sounds\en\us\female\conference\conf-help_menu.vox"; fsApi.Execute("uuid_displace", ev_all.GetHeader("Caller-Unique-ID") + " start " + filename + " 10 mux"); ----- Original Message ----- From: "Frankie Yiu" <yky1628@yahoo.com> To: <kris@livecall.com> Sent: Friday, February 11, 2011 7:03 PM Subject: Re: [Freeswitch-users] How to set up a DTMF callback in C or C#? Thanks for your reply earlier, it works. For some reason, I can not reply the thread so I send you this message privately. Since you might know about using C# w/ FreeSwitch, I might ask you this: 1) If I want to use the Media bugs, how can I do this in C#? I see a method that I want to use in swig.cs: "switch_core_media_bug_add", but what is the parameters for the call back function?

From the definition in switch_types.h: switch_bool_t (*switch_media_bug_callback_t) (switch_media_bug_t *, void *, switch_abc_type_t);

but what is it in C# since it does not have pointers? 2) I see that some functions have type like this "SWIGTYPE_p_p_ ..." (for example: SWIGTYPE_p_p_switch) , do these type really work (expecially for those pointer to pointer type in C/C++)? I tried to call: "switch_core_session_read_frame(SWIGTYPE_p_switch_core_session session, SWIGTYPE_p_p_switch_frame frame, uint flags, int stream_id) " but seem like when I pass in a variable for frame, when the program gets to freeswitch_wrap.cxx side, it lost its frame's memory address/place holder. Am I doing something wrong? Thanks in advance. Frankie ____________________________________________________________________________________ Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. http://games.yahoo.com/games/front