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barcode

barcode

(OP)
1. how can vfp read barcode ?
2. I have been building file.exe, but it can't permanent on the screen, why ?

RE: barcode

By using a barcode reader with a "keyboard wedge", you can scan barcodes. VFP (or any other program) sees the barcode as coming from the keyboard. Some barcode readers also have a serial connection that you can use.

You have to set up an event handler to keep the EXE running. I usually set up a prg called start.prg and it will contain variable definitions, opening the database, reading configuration files, etc. But the main thing it does is to have the following code:

Public OkToRun
OkToRun = .T.
Do While OkToRun
Read Events
EndDo

Then in the menu choice, button (or whatever the user clicks on to exit) I put the following code:

OkToRun = .F.
Clear Events

RE: barcode

Check out a company called TAL. They make a product called BC-Wedge. It's software for Windows that allows communication from the reader through a serial port directly into the keyboard buffer. I believe it is less clunky than the "keyboard wedge" approach (although that works okay).

TAL has the "keyboard wedge" solution too. I just found the BC-Wedge cheap, easy to implement, and reliable.

Good Luck!

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