The File menu controls starting and stopping scans for calls to OutputDebugString, clearing the display and exiting the program.
File > Scan Directory...
Displays a directory chooser then starts scanning that directory for calls to the functions listed in the settings.
File > Stop scan
Stops any scan that is in progress
File > Clear Display
Clear all results from a previous scan and to remove any source code from the source code editing window.
File > Exit
Closes OutputDebugString Checker