HOW TO DETECT A ENTRY FROM BARCODE SCANNER OR KEYBOARD

[remsor]

Hello everybody...

HOW TO DETECT A ENTRY COMING FROM A BARCODE SCANNER OR KEYBOARD..

i have POS application using barcode scanner, my client encountered million amount tendered.. They found that when the amount tendered prompts the scanner scanned the barcode of the item of the next client which is 9 digits.. How can i detect if it is from the scanner or keyboard...

please help me..;-)

 

[RLG07734]

we use barcode scanners for most of our production, they are connected in the keyboard using a 'y' connector.
most of the coding should be handled by your application, ie if you scan a barcode over a certain number of characters then place that input into the appropriate field on your form. there really is no way to determine if something came from the scanner or the keyboard.

 

[rgbean]

remsor,
Most barcode readers use a "wedge" to put characters into the system through the keyboard buffer, and then you can't tell the difference. If you MUST tell the difference, consider using a serial port scanner, than you'll need to use MSCOMM32 to read the buffer so you'll know where the data came from - this can make your forms much more complicated though.

Rick