Read Method

Reads data from the port.

Syntax

Visual Basic -
Delphi function Read(DataBuffer: OleVariant, BytesToRead: Integer): Integer;
Visual C++ (MFC) long Read(VARIANT * DataBuffer, long BytesToRead);
Visual C++ (#import) long Read(VARIANT * DataBuffer, long BytesToRead);

Parameters

DataBuffer

[in, out] The buffer that receives the data.

BytesToRead

[in] Variable that receives the number of bytes read from port.

Return

Number of bytes read.

Errors

The method may throw exception. Use GetLastError method to get the error code.

ftvspcErrorFailed 1 The operation has not been completed.
ftvspcErrorInvalidParameter 2 Invalid parameter.

See Also

Attach, Write