uses DB, DBTables, DBITypes, DBIProcs; 

procedure TForm1.FormCreate(Sender: TObject); 
begin  
  Session.GetAliasNames(ListBox1.Items); 
end; 

procedure TForm1.ListBox1Click(Sender: TObject); 
var 
  tStr: array[0..100] of char; 
  Desc: DBDesc; 
{ 
 The DBDesc structure describes a database, using the following fields: 

 szName     DBINAME  Specifies the database alias name. 
 szText     DBINAME  Descriptive text. 
 szPhyName  DBIPATH  Specifies the physical name/path. 
 szDbType   DBINAME  Specifies the database type. 
} 
begin 
  if ListBox1.Items.Count = 0 then 
    exit; 
  StrPLCopy(tStr, ListBox1.Items.Strings[ListBox1.ItemIndex], High(tStr)); 
  DbiGetDatabaseDesc(tStr, @Desc); 
  with Desc do 
  begin 
    Label1.Caption := StrPas(Desc.szName); 
    Label2.Caption := StrPas(Desc.szPhyName); 
    Label3.Caption := StrPas(Desc.szDbType); 
    Label4.Caption := StrPas(Desc.szText); 
  end; 
end;