I have an irb that functions using the UI and using a cmd line.  Unfortunately both require UAC acknowledgment.  Since these are being fired off by an application I am developing using Delphi I thought I would try the OCX.  I was able to import the type_lib and generate a .pas unit.  when I run this simple example I get a zero return from run and all of the others indicating success but no log file or the expected csv file are generated.  I have checked all file and directory spellings and each is correct.  Any suggestions as to what I am doing wrong or missing?
 
procedure TForm1.btn1Click(Sender: TObject);
var
  irob:TIrobotX;
  i:integer;
begin
  irob:=TIrobotX.Create(nil);
  if iRob.setIrbFile('c:\Irobotsoft\Yahoo splits.irb','')<0 then
    showMessage('Failed setIRBfile');
  if iRob.setLogFile('C:\Hilltop Securities\downloads\irb.log',255)<0 then
    showMessage('Failed setLogFile');
  if irob.prepareRobot('c:\hilltop securities\downloads\')<0 then
    showMessage('Failed prepareRobot');
  i:=irob.run('YahooSplits',1);
  if i<0 then
    showMessage('Failed run')
  else
    showMessage('result: '+intToStr(i));
end;

After setLogFile, you can also add IrbtX1.showBrowser(1) to show the browser and its action.  
 
Also, we are no longer actively maintain the OCX.  It is recommended to use command line or python htql to interact with irobot.  
 

The ocx becomes difficult to maintain because of window security issues.  
 
You can use the same command line parameters for either irobot.exe and irbrun.  The irbrun will not be able to run javascript on the pages.