Powerpoint presentation in windows form

This is what I have that work mostly. The only issue that I am trying to solve right now is that when this is executed, it shows on the screen first and then in the application.

Process p;
Timer t = new Timer();

p = Process.Start("powerpnt", "/s " + ConfigurationManager.AppSettings["Output"]);


void t_Tick(object sender, EventArgs e)        
{            
     try            
     {                
             t.Enabled = false;                
             SetParent(p.MainWindowHandle, panel1.Handle);                
             MoveWindow(p.MainWindowHandle, 1, 1, panel1.Width - 2, panel1.Height - 2, true);            
     }            
     catch (Exception ex)            
     {                          
     }        
}