Image is a reference to the source image.

ROI Descriptor is a descriptor that defines the region of interest within which the code is located. The first contour of the ROI must be a rectangle, rotated rectangle, oval, annulus, polygon, or freehand region. If the ROI descriptor is empty or not connected, the entire image is considered to be the region.

	Global Rectangle contains the coordinates of the bounding rectangle.
	Contours are each of the individual shapes that define an ROI. ID refers to whether the contour is the external or internal edge of an ROI. Type is the shape type of the contour. Coordinates indicates the relative position of the contour.

Search Mode specifies whether the VI searches for one or multiple codes. The following values are valid:

error in (no error) describes the error status before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

	status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
	code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
	source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

Image (duplicate) is the reference to the image that contains the Data Matrix code.

Barcodes is a cluster of information about each of the codes that the VI read.

	Type is the type of code.
	Binary indicates if the barcode contains encoded non-ASCII binary data (TRUE) or ASCII text (FALSE).
	Data is the encoded information that the VI read.
	Bounding Box is an array of five points that define the boundary of the code in the image.
	Errors Corrected is the number of erasures that the VI corrected using inherent error correction.
	Erasures Corrected is the number of erasures that the VI corrected using inherent error correction.
	Rows is the number of rows in the barcode.
	Columns is the number of columns in the barcode.

Number of Barcodes is the number of codes that the VI detected and read.

error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.

	status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
	code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
	source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.