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Accessing USB-device: How to determine lpFileName in CreateFile call

Accessing USB-device: How to determine lpFileName in CreateFile call

Accessing USB-device: How to determine lpFileName in CreateFile call

(OP)
I am trying to communicate (send and receive ASCII-characters) with a USB-barcode printer. In order to get a handle to the device I believe I have to call CreateFile and it has the following prototype:

HANDLE WINAPI CreateFile(
  __in      LPCTSTR lpFileName,
  __in      DWORD dwDesiredAccess,
  __in      DWORD dwShareMode,
  __in_opt  LPSECURITY_ATTRIBUTES lpSecurityAttributes,
  __in      DWORD dwCreationDisposition,
  __in      DWORD dwFlagsAndAttributes,
  __in_opt  HANDLE hTemplateFile
);

How do I determine what the first parameter should be? I guess it should be something similar to

"\\\\.\\xxxUSBxxx"

Where can I look for clues on what this string should be?

RE: Accessing USB-device: How to determine lpFileName in CreateFile call

(OP)
Many thanks for this most valuable link!

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