Datawedge Download Mc9190z
It's been 15 years since I used those ex-Symbol hand held devices, but I will try to be of some help anyway. There are two ways you can use scanning device on them. First is to use a Symbol scanner data wedge application to redirect scanner input into any edit field that is in focus. That is the most simple way and that looks to your application like user has typed him self the barcode or RFID number, so programming is easy.
Second is to use Symbol provided DLLs directly, and that is what you see that SymScan does - a component wrapped around 'symscanapi.pp' which contains bindings to 'SCNAPI32.DLL'. Download panasonic pbx unified maintenance console usb driver. For RFID scanning there is no such component.
Amazon.com: Zebra MC9190-Z RFID Handheld Reader Kit (902-928 MHz): Home Audio. NET, C++, Java Demo Software: Data Wedge PRODUCT REVIEWS.
You have to make it. As the SymScan author had to download C/C++ SDK and convert 'SCNAPI32.DLL' bindings to Pascal, you will have to download SDK and convert 'RFIDAPI32.DLL' C bindings to Pascal. If I remember well in the time of Symbol it used to be called Symbol SDK, in time of Google/Motorola it was called Motorola EMDK, and now in Zebra time they call it EMDK for C.
Here are some links to give you some startup info.