Search for id in a specific files (Vulpes Help me)

Hi, 
I should search for a file with extension .ptg in a path(For example c:\ptgfiles) note: Subfolders is also there.
My all ptg files has some text is as follows:

------

There are some FFD files with extension .FFD are in H folder.
My FFD files some text as follows: (But all FFD files does not have same text, the GUID is different.)
[FileVersion]
GUID={F5C91E25-E904-4AD0-AA6A-41FD0A5A12E4}
Version=9
MarkupVersion=0
DisplayName=XML-MDB-Satzweise-nxt
FileExtension=*.xml
----
Now my requirement is:
1: Take each .ptg file and search for GUID number of ptg file (here in my example:F5C91E25-E904-4AD0-AA6A-41FD0A5A12E4) and Using this GUID, serach for exact GUID number in H folder FFD file.
 If GUID is matched i have to show GUIDs and Display names in my combobox.
At the same time i have to show all ptg file paths in listbox.


I am stucked at this point. How can i do??


Give me some ideas to do.
Darma