Interface IVisaSession

Description

The base interface for VISA COM I/O resources. This interface has the properties and methods available on all resource types, specifically the lifetime management, locking, identification, and other facilities.

Methods

GetAttribute	Use of this method is discouraged. All the non-deprecated standard attributes are accessible via properties on the appropriate COM interfaces.
SetAttribute	Use of this method is discouraged. All the non-deprecated standard attributes are accessible via properties on the appropriate COM interfaces.
LockRsrc	Locks the resource.
UnlockRsrc	Unlocks the resource
Init	Opens the resource. This is the first method on IVisaSession or any of its derived interfaces to be called. In general, you will not call this method because you will use the Resource Manager to create resources.
Close	Closes the resource. Sending the resource's COM object's reference count to zero (and thus destroying the object) also executes a close, but this method may be useful for environments with garbage collection or other facilities that make object lifetimes non-deterministic.

Properties

ComponentVersion	A numeric version for this component.
SpecVersion	The VISA-defined version information for the specification version to which this component complies.
HardwareInterfaceName	The name of the hardware interface (GPIB, ASRL, etc.).
HardwareInterfaceNumber	The board number of the hardware interface.
HardwareInterfaceType	The type number of the hardware interface.
LockState	The current locking state of the interface.
OptionString	The option string corresponding to the current state of the resource.
ProgID	The programmatic ID that can be used by COM to create this object.
ResourceName	The VISA resource name of the currently open resource. This name is the canonical version of the resource name and therefore may vary from the resource string used to open/init the resource.
SessionType	The session type string, such as "INSTR" or "INTFC".
SoftwareManufacturerID	The ID number of the vendor of this software component.
SoftwareManufacturerName	The name of the vendor of this software component.
Timeout	The I/O timeout in milliseconds for I/O communication on this resource session.
LastStatus	The return value from the last method call on this interface. This property may be useful in Visual Basic, where positive return values, such as warnings and other non-error return values, cannot be retrieved. See the Return Values page for a list of positive return values.