ITcVnData

Interface for accessing data.

Inheritance Hierarchy

ITcUnknown
ITcVnData

Methods

Name	Origin	Description
TcAddRef	ITcUnknown	Increments the reference counter.
TcQueryInterface	ITcUnknown	Get a reference to an implemented interface.
TcRelease	ITcUnknown	Decrements the reference counter.
CheckIfCopy	ITcVnData	Check if the data are a copy (returns S_OK for copies and S_FALSE otherwise).
CheckIfImage	ITcVnData	Check if the data belongs to an image (returns S_OK for images and S_FALSE otherwise).
GetSize	ITcVnData	Gets the size of the data.
CheckDataPointer	ITcVnData	Check if the data pointer is different from 0 (returns S_OK for non-zero data pointers and S_FALSE otherwise).
GetDataPointer	ITcVnData	Gets the data pointer (the obtained data pointer must be released by calling ReleaseDataPointer).
ReleaseDataPointer	ITcVnData	Release the data pointer.

Further information

The interface ITcVnData is used for internal purposes and is not normally needed by the user. For access to raw image data, use the function GetRowPointer of the interface ITcVnImage instead.

System Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT V3.1.4024.54 or later	PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU	Tc3_Vision

Further Information