Barcode reading and POS \"Quick project fast payment\" - repost

This is a very quick project and payment will be within 12 hour . but the code should be perfect . As you all knows . Barcode readers acts like a normal keyboard . what i need is to program my software to recognize the barcode reads . So when barcode reads . my software knows that this is a barcode and takes the string to the specif place (textbox for example ). now , i already have the following code : int i = [login to view URL]; //[login to view URL](i + ""); [login to view URL] = true; TimeSpan elapsed = [login to view URL] - _lastKeystroke; _lastKeystroke = [login to view URL]; if ([login to view URL] > 100) { \do some coding } as you all knows , the barcode strokes is fast , so here they calculate the time between each stroke . but the problem here, that if the user is fast enough , the program will recognize his typing as barcode . to override this problem , we can use prefix and suffix (for example ) . we can use special suffix and prefix so we can get the exact barcode . but i don't really konw how to code my software and to program my barcode readers . ( honeywheel voygar 1250g) . After all, this is my own ideas . my goal is to get the barcode to the specif target (textbox) whatever the user is focusing on . you can use any ideas . the programming language should be c# /Winform. this is top urgent small mission . and we need it to be finished today .