'Declaration
 
Public Function New( _
   ByVal resourceName As String, _
   ByVal accessModes As AccessModes, _
   ByVal timeoutMilliseconds As Integer _
)

'Usage
 
Dim resourceName As String
Dim accessModes As AccessModes
Dim timeoutMilliseconds As Integer
 
Dim instance As New UsbSession(resourceName, accessModes, timeoutMilliseconds)

public UsbSession( 
   string resourceName,
   AccessModes accessModes,
   int timeoutMilliseconds
)

public:
UsbSession( 
   String^ resourceName,
   AccessModes accessModes,
   int timeoutMilliseconds
)

Parameters

resourceName

The descriptor of the resource to which this class will be connected.

accessModes

The modes by which the resource is to be accessed. ExclusiveLock is used to acquire an exclusive lock immediately upon opening a session. LoadConfig is used to configure attributes to values specified by some external configuration utility. The default in None.

timeoutMilliseconds

If the accessMode parameter requests an exclusive lock, this parameter specifies the absolute time period (in milliseconds) that the constructor waits for a locked resource to be unlocked before throwing an exception, otherwise this parameter is ignored. If the value is VisaConstants.ImmediateTimeout (0), operations will never wait for the lock. If the timeout is VisaConstants.InfiniteTimeout (-1), the attempt to wait for the lock will never timeout. Negative values other than -1 are treated as unsigned values in the range between Int32.MaxValue and UInt32.MaxValue.

Some Keysight IO Libraries Connection Expert settings and Keysight Instrument Discovery Service policies affect the operation of this constructor. Refer to the IO Libraries Suite Help for more details.

For instruments that are auto-discovered by the Discovery Service, the constructor verifies that the instrument is present.

For instruments that are manually-added, the constructor does not verify the presence of the instrument. If the device is not present or not turned on, you will not discover this until you attempt to communicate with the instrument.

Current with Keysight IO Libraries Suite 18