procedure TForm1.FormCreate(Sender: TObject);
var filename,directory,exefile:PChar;
begin
  getmem(filename,255);
  getmem(directory,255);
  getmem(exefile,255);

  filename:=string('adver.htm');
  directory:=string('c:\');

  if findexecutable(filename,directory,exefile)>32 then
  begin
    edit1.text:=string(exefile); //=path+name for browser
  end;
end;

remember that filename MUST be an existing file.
---
>Is there a way or a component for Delphi 3 that I can use to pass a URL to
>a default browser and send it to the page. If the browser is not already
>pen, fire that as well?

I use:

  ShellExecute( Application.Handle, 'open', 'http://cleanandsimple.com',
nil, nil, SW_NORMAL );

to send folks to my site.  Be sure to include ShellAPI in your uses clause.