Chapter 8 Utility Library
© National Instruments Corporation 8-71 LabWindows/CVI Standard Libraries
SetPersistentVariablevoid SetPersistentVariable (int value);
Purpose
Lets you store an integer value across multiple builds and executions of your project in the
LabWindows/CVI development environment. When you unload a project or load a new project,
the value is reset to zero.
This function is useful when your program performs an action (such as setting up your
instruments) that takes a long time and that you do not want to be repeated each time you re-run
your program. Global variables in your program are reinitialized to zero each time you run your
project. Thus, they cannot be used to indicate that you have already taken the action once.
To get around this problem, LabWindows/CVI maintains an integer variable across multiple
builds and executions of your project. This function sets the value of that variable. To retrieve
the variable value, call GetPersistentVariable().
Parameters
Input value integer The value to assign to the
persistent variable.
SetStdioPortint status = SetStdioPort (int stdioPort);
Purpose
Sets the current destination for data written to the standard output (and the source of data read
from standard input).
You can specify either the CVI Standard Input/Output window or the standard input/output of
the host system.
Note: This function is valid only on the UNIX version of LabWindows/CVI.