Hey, My boss put me in charge of getting this pin pad device to work with our software. We have it plugging into the usb port with a converter cable that converts it to a rs232 port. This converter cable uses the pl2303 driver to aid with this. I am new to drivers, particularly on the windows OS. My question is how do I use this driver to communicate with the device? I'm trying to read into it but am being overloaded by information and I think I could use some help. I was reading something about using the win32 api and using create file to get a handle? I found this to be quite confusing and am having trouble finding examples of how to use this handle. Isn't there just some standard I/O library I can use to communicate? Please help! Here's some info on the device: 2 ] : [USB DEVICE] on Port 1 Address : 2 uniqueID : USB/Adr_2&Port_1&Vid_067b&Pid_2303&Rev_0400&Ver_0110&DevClass_00&DevSubClass_00&NumC_01 driverKeyName : {4d36e978-e325-11ce-bfc1-08002be10318}\0000 friendlyDeviceName: Prolific USB-to-Serial Comm Port Object Type : Device, DeviceImpl, NonJUSB Device Descriptor: bcdUSB : 1.1 Device Class : 0 ( device ) Device Subclass : 0 Device Protocol : 0 Max Packet Size : 64 idVendor : 1659 0x67b idProduct : 8963 0x2303 bcdDevice release number : 4.0 iManufacturer : 1 iProduct : 2 iSerialNumber : 0 NumConfiguration : 1 Configuration Descriptor: wTotalLength : 39 bNumInterfaces : 1 bConfigurationValue : 1 bmAttributes : 160 Device supports Remote Wakeup! bMaxPower : 50 ( 100mA) Interface Descriptor[0]: bInterfaceNumber : 0 bAlternateSetting : 0 bNumEndpoints : 3 bInterfaceClass : 255 bInterfaceSubClass : 0 bInterfaceProtocol : 0 iInterface : 0 Interface[0] Endpoint Descriptor[0]: bEndpointAdress : 1 IN Pipe Data flows from Device to Host bmAttributes : 3 Type: interrupt bMaxPacketSize : 10 bInterval : 1 getEndpoint : 129 81 Interface[0] Endpoint Descriptor[1]: bEndpointAdress : 2 OUT Pipe Data flows from Host to Device bmAttributes : 2 Type: bulk bMaxPacketSize : 64 bInterval : 0 getEndpoint : 2 2 Interface[0] Endpoint Descriptor[2]: bEndpointAdress : 3 IN Pipe Data flows from Device to Host bmAttributes : 2 Type: bulk bMaxPacketSize : 64 bInterval : 0 getEndpoint : 131 83