title: trace the data flow when the executable is running
body: <p>I am practicing reversing skill using OLLdbg under windows.</p>
  
  <p>there is an interactive window asking you input, let's say "serial number". My question is when user operate on the window, it is hard to locate related data flow within the debugger window. For example, if I click "F9", we can view the instruction flow; but When inputing on the window, I can't know which instructions have been executed. </p>
  
  <p>My target is to find some jump instruction and change it, so that I can bypass the correct input requirement. I think the instruction should be quite close to instruction related to arg#, and related to TEST command. </p>
  
  <p>Looking for hint or trick. Thanks.  </p>