retaining a variables value after the application has quit

So I am developing an application for a Windows Mobile Device.  In visual studio it is a Pocket PC 2003 Project.  This application brings up the camera, and saves pictures as a filename that i have specified.  I want to number the images in the order they were taken, but the problem is, when a user quits the program the number variable that gets in the filename gets reset, is there a way for me to initialize this variable once and have it retain its value the next time the user starts the program so that the images are numbered in sequential order?
bquinn10Asked:
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Mike TomlinsonConnect With a Mentor Middle School Assistant TeacherCommented:
Yes...a "config" file is just a text file with the data formatted in it however you choose.

Another option is to query the system and look at all the existing files that match your pattern...and then determine the next available number based on what is already present on the system.
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CuteBugCommented:
Create a config file for the application and store the latest value of the variable when the application quits.

When the application is started, check if the config file exists:
If it does, retrieve the value and assign it to the variable.
If it does not, initialize the variable, create a new config file and store the value in the file.
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bquinn10Author Commented:
ok that sounds easy enough but how do u create a config file? is it just a text file?
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