可以開啟USB介面上的裝置，或者開啟USB控制器，那涉及到windows的驅動訪問。

一般訪問裝置使用CreateFile開啟裝置，然後使用ReadFile/WriteFile讀寫裝置。

比如：

HANDLE hFile = CreateFile(..., FILE_FLAG_OVERLAPPED, ...); //指定以非同步方式開啟

BYTE bBuffer[100];

OVERLAPPED o = { 0 };

o.Offset = 345;

BOOL bReadDone = ReadFile(hFile, bBuffer, 100, NULL, &o); // bReadDone 指定I/O請求是不是以同步方式開啟

DWORD dwError = GetLastError();

if (!bReadDone && (dwError == ERROR_IO_PENDING)) { //非同步方式開啟

// The I/O is being performed asynchronously; wait for it to complete

WaitForSingleObject(hFile, INFINITE);

bReadDone = TRUE;

}

if (bReadDone) {

// o.Internal contains the I/O error

// o.InternalHigh contains the number of bytes transferred

// bBuffer contains the read data

} else {

// An error occurred; see dwError

}