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Use the Data Communication VIs and functions to exchange data between applications.

The VIs and functions on this palette can return SMTP email reply codes.

Palette Object	Description
Global Variable	Use global variables to access and pass data among several VIs.
Local Variable	Use local variables to read or write to one of the controls or indicators on the front panel of a VI.
Shared Variable	Represents a shared variable on the block diagram. To bind a Shared Variable node to a shared variable from the active project, place a Shared Variable node on the block diagram and double-click it or right-click it and select Select Variable from the shortcut menu to display the Select Variable dialog box. You also can drag a shared variable from the Project Explorer window onto the block diagram of a VI in the same project to create a Shared Variable node.

Subpalette	Description
DataSocket VI and Functions	Use the DataSocket VI and functions to pass data between VIs programmatically.
Protocols VIs and Functions	Use the Protocols VIs and functions to exchange data between applications by using protocols such as TCP/IP, UDP, serial, IrDA, Bluetooth, and SMTP.
Queue Operations Functions	Use the Queue Operations functions to create a queue for communicating data between sections of a block diagram or from another VI.
Synchronization VIs and Functions	Use the Synchronization VIs and functions to synchronize tasks executing in parallel and to pass data between parallel tasks.