Msn contact list

[Razor]

First of all i wrote this code second of all it dosen't work as it should.Well what i want to do is that it adds only people with certain status to the list.

Delphi-Quellcode:

  

 const
  MISTATUS_UNKNOWN = $00000000;
  MISTATUS_OFFLINE = $00000001;
  MISTATUS_ONLINE = $00000002;
  MISTATUS_INVISIBLE = $00000006;
  MISTATUS_BUSY = $0000000A;
  MISTATUS_BE_RIGHT_BACK = $0000000E;
  MISTATUS_IDLE = $00000012;
  MISTATUS_AWAY = $00000022;
  MISTATUS_ON_THE_PHONE = $00000032;
  MISTATUS_OUT_TO_LUNCH = $00000042;
  MISTATUS_LOCAL_FINDING_SERVER = $00000100;
  MISTATUS_LOCAL_CONNECTING_TO_SERVER = $00000200;
  MISTATUS_LOCAL_SYNCHRONIZING_WITH_SERVER = $00000300;
  MISTATUS_LOCAL_DISCONNECTING_FROM_SERVER = $00000400;

function contactslist(status:MISTATUS):string;

  var
  MSNMessenger:  IMessenger;
  MSNMyContacts: IMessengerContacts;
  MSNMyContact:  IMessengerContact;
  v_Count: Integer;
  begin

 for v_Count := 0 to MSNMyContacts.Count - 1 do           

 begin
    if MSNMyContact.Status=status then  // <<< compiler shows error here!!!

    MSNMyContact := (MSNMyContacts.Item(v_Count) as IMessengerContact);
   result:= MSNMyContact.FriendlyName +  '  ' +MSNMyContact.FriendlyName;


  end;
   end;

  procedure TfrmMain.Button2Click(Sender: TObject);

begin

    ListBox1.Items.Add(contactslist( MISTATUS_ONLINE));
  end;

[Meflin]

Could you tell us the error message - maybe we could help you then

But obviously you are trying to use an unreferenced interface - How do you think this should work exactly?

[Razor]

This gets contact list it just doesnt get what i want to get list with status.


---------------------------
Debugger Exception Notification
---------------------------
Project MSNMessengerAPIController.exe raised exception class EAccessViolation with message 'Access violation at address 0047F15B in module 'MSNMessengerAPIController.exe'. Read of address 00000000'.
---------------------------
Break Continue Help
---------------------------

[mkinzler]

Try to debug it, so you can tell us in wich line the exception is raised

[Razor]

Zitat von mkinzler:

Try to debug it, so you can tell us in wich line the exception is raised

if MSNMyContact.Status=status then // <<< compiler shows error here!!!

[Namenloser]

You access MSNMyContacts without initializing it first. Btw, you should really format your code properly.

[mkinzler]

Zitat:

Delphi-Quellcode:

if MSNMyContact.Status=status then  // <<< compiler shows error here!!!

    MSNMyContact := (MSNMyContacts.Item(v_Count) as IMessengerContact);
   result:= MSNMyContact.FriendlyName +  '  ' +MSNMyContact.FriendlyName;

You only can evaluate the reference after assigning an object to it. Maybe you have to change the order

[Razor]

Initilized but still same error and this gets me thinking


Even if i change the line order still the same error

Delphi-Quellcode:

 
if MSNMyContact.Status=status then BEGIN
for v_Count := 0 to MSNMyContacts.Count - 1 do
MSNMyContact := (MSNMyContacts.Item(v_Count) as IMessengerContact);
result:= MSNMyContact.FriendlyName +  '  ' +MSNMyContact.FriendlyName;

Delphi-Quellcode:

 function contactslist(status:MISTATUS):string;
  var
  MSNMessenger:  IMessenger;
  MSNMyContacts: IMessengerContacts;
  MSNMyContact:  IMessengerContact;
  v_Count: Integer;
  begin
  MSNMessenger := MessengerAPI_TLB.CoMessenger.Create;
  MSNMyContacts :=  (MSNMessenger.MyContacts as IMessengerContacts);


 for v_Count := 0 to MSNMyContacts.Count - 1 do
 begin
 if MSNMyContact.Status=status then BEGIN

 MSNMyContact := (MSNMyContacts.Item(v_Count) as IMessengerContact);
 result:= MSNMyContact.FriendlyName +  '  ' +MSNMyContact.FriendlyName;


end;
end;
end;

[mkinzler]

If you wanna pour water out of an bottle, you have to open it first. You still evaluate an reference before you ajust it to an object!!!

[Razor]

MISTATUS is ToleEnum