>I have this project regarding a POS system and like all POS systems, it uses
>a cash drawer. I know already how to programmatically open the cash drawer,
>but my dilemna now is how do i determine if it has already been closed. I was
>able to open the drawer by opening a communication port (COM1) using FOPEN
>and "wrote" some character data to open it using FWRITE. Question is, how do
>i know if the cash drawer was closed already? When the cash drawer closes,
>does it "write" back something? If so, what?

The OLE for POS controls support the OpenDrawer() and WaitForDrawerClose() methods along with the DrawerOpened property. It might be easier for you to use these, if your drawer manufacturer supports the OPOS standard.

http://pos.epson.com/pointofsale/opos.shtml