[Iaxclient-devel] Re: Iaxclient-devel digest, Vol 1 #204 - 4 msgs

[Babar S. <bab...@ya...>]

Hello,

Without DLL wrapping or COM based interface it is not possible to call iaxclient from VB. You have to create a DLL (Static or COM based) to call from VB. 
 
For old style DLL wrapping you have to call like this:-
 
Private Declare Sub xxxx Lib "iaxclient" Alias "xxx" etc
 
and from COM based project you can call :-
 
Private Sub IaxClientOcx1_GetAudioDevices(ByVal Types As String, ByVal DeviceName As String)
If Types = "INPUT" Then cmb_input_dev.AddItem DeviceName
If Types = "OUTPUT" Then cmb_output_dev.AddItem DeviceName
If Types = "RING" Then cmb_ring_dev.AddItem DeviceName
End Sub
 
Private Sub IaxClientOcx1_levels(ByVal input1 As Long, ByVal output1 As Long)
'write code to display levels in progress bar
End Sub
 
Private Sub IaxClientOcx1_Messages(ByVal Message As String)
lbl_messages.Caption = Message
End Sub

Private Sub IaxClientOcx1_State(ByVal StateEvent As String)
lbl_state.Caption = StateEvent
End Sub
 
etc...
 
Date: Wed, 21 Apr 2004 09:27:27 -0400
From: Steve Kann 
To: Eloy Domingos 
CC: iax...@li...
Subject: Re: [Iaxclient-devel] Creating iaxclient .dll for Borland C++


I think that several people are making DLLs from iaxclient, but they all 
use some kind of "glue" file to do it.

As I understand it, it should be relatively straightforward to make the 
iaxclient library functions available when compiled to a DLL (while also 
making sure it can still compile to a static library with different 
options).

The issue for some people (not for you), was that they didn't know how 
(or it may not be possible) to have Visual Basic access the union which 
we're currently using for events:

typedef struct iaxc_event_struct {
int type;
union {
struct iaxc_ev_levels levels;
struct iaxc_ev_text text;
struct iaxc_ev_call_state call;
} ev;
} iaxc_event;

So, making the current API available to Visual Basic is problematic. We 
could add a couple of simple C functions to do the casting necessary, 
though. Basically something like this:

struct iaxc_ev_levels *iaxc_extract_levels(struct iaxc_event struct *s) {
return &(s->levels);
}

etc.

This would allow VB programmers (I think) to get the union members 
without needing to figure out how to make VB access the union.

If we do this, though, I'd like input from the VB and other DLL users 
though, so we can make a solution that works for everyone.

-SteveK


Eloy Domingos wrote:

>Hi All,
>
>
>I was wondering whether anyone has been able to successfully create
>a win32 .dll file for Borland C++ enterprise developer, without altering
>the iaxclient lib sources. If so, I would like to know how this was
>achieved (project/unit settings, compiler/linker configuration).
>
>I have been able to use iaxclientlib with some success in my IAX2 
>softphone client, but I had to modify the iaxclient lib and various
>other libraries (gsm, speex, portaudio), in order to compile/link them into
>my application. Instead of this, I would prefer a cleaner interface 
>between my application and the libiaxclient suite by compiling it into
>a .dll (with typelib info). 
>
>Any pointers or info will be appreciated.
>
>
>Thanks in advance,
>Eloy Domingos


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