ReadStringNoPoll

Reads string data from a device without polling for instrument errors after the read.

virtual HRESULT ReadString(CString& pResult, long lTimeout = CUR_TIMEOUT) override;

virtual HRESULT ReadString(BSTR* pResult, long lTimeout = CUR_TIMEOUT) override;

Parameters

pResult: [out] String data read from the device.
lTimeout: [in] I/O timeout value in milliseconds.

Return Value

Returns S_OK if successful, otherwise a failure HRESULT.

Remarks

This function behaves identically to ReadString except that the device is not polled for errors after the data is read.

Example

The following example demonstrates use of the ReadStringNoPoll function.

C++

Copy

// CoAcme4321.cpp
STDMETHODIMP Acme4321::IAcme4321_QueryData(BSTR* pbstrData)
{
  HRESULT hr = S_OK;

  // Read until END or termchar encountered
  hr = io.ReadStringNoPoll(pbstrData);

  return hr;
}

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