Detecting when a User takes a Screenshot (Header File)

#import <Cocoa/Cocoa.h>

@interface YouAppDelegate : NSObject <NSApplicationDelegate> {

    BOOL shouldObserveDesktop;
    NSDictionary *knownScreenshotsOnDesktop;
    NSString *screenshotLocation;
    NSString *screenshotFilenameSuffix;

}

- (void)startObservingDesktop;
- (void)stopObservingDesktop;
- (NSDictionary *)screenshotsOnDesktop;
- (NSDictionary *)screenshotsAtPath:(NSString *)dirpath modifiedAfterDate:(NSDate *)lmod;
- (void)checkForScreenshotsAtPath:(NSString *)dirpath;
- (NSDictionary *)findUnprocessedScreenshotsOnDesktop;

@end