public static extern int WriteFile(IntPtr hFile, IntPtr lpBuffer, int nNumberOfBytesToWrite,
ref int lpNumberOfBytesWritten, ref OVERLAPPED lpOverlapped);
public static extern int WriteFileEx(IntPtr hFile, IntPtr lpBuffer, int nNumberOfBytesToWrite,
ref OVERLAPPED lpOverlapped, ref int lpCompletionRoutine);
public static extern int UnlockFileEx(IntPtr hFile, int dwReserved, int nNumberOfBytesToUnlockLow,
int nNumberOfBytesToUnlockHigh, ref OVERLAPPED lpOverlapped);
public static extern int WaitCommEvent(IntPtr hFile, ref int lpEvtMask, ref OVERLAPPED lpOverlapped);
public static extern int TransactNamedPipe(IntPtr hNamedPipe, IntPtr lpInBuffer, int nInBufferSize,
IntPtr lpOutBuffer, int nOutBufferSize, ref int lpBytesRead, ref OVERLAPPED lpOverlapped);
public static extern int ReadFile(IntPtr hFile, IntPtr lpBuffer, int nNumberOfBytesToRead,
ref int lpNumberOfBytesRead, ref OVERLAPPED lpOverlapped);
public static extern int GetOverlappedResult(IntPtr hFile, ref OVERLAPPED lpOverlapped,
ref int lpNumberOfBytesTransferred, int bWait);
public static extern int ConnectNamedPipe(IntPtr hNamedPipe, ref OVERLAPPED lpOverlapped);
public static unsafe DeviceInfo GetUSBDeviceInfo(string printerName)
{
string response = "";
var deviceInfo = new DeviceInfo();
try
{
var file = OpenUSBPrinter(printerName);
var packet = new byte[2048];
int size = 0;
var buffer = new byte[255];
fixed (byte* p = packet)
{
var ptr = (IntPtr) p;
int result = Kernel.DeviceIoControl(file.DangerousGetHandle(), // device to be queried
IOCTL_USBPRINT_GET_1284_ID, // operation to perform
IntPtr.Zero, 0, // no input buffer
ptr, packet.Length, // output buffer
ref size, // # bytes returned
IntPtr.Zero); // synchronous I/O
if (size > 0)
{
deviceInfo.DeviceId = Encoding.ASCII.GetString(packet);
}
var overlapped = new OVERLAPPED();
result = Kernel.ReadFile(file.DangerousGetHandle(), ptr, packet.Length, ref size, ref overlapped);
if (size > 0)
{
deviceInfo.ExtData = Encoding.ASCII.GetString(packet);
}
}
Kernel.CloseHandle(file.DangerousGetHandle());
}
catch (Exception e)
{
Global.Logger.Fatal(e.Message);
}
return deviceInfo;
}