Using Expressions and Variables: Introduction

An expression is a user-defined condition used with PC-DMIS's flow control commands. Using flow control statements, you can test these conditions in your measurement routine. If the condition is met or not, you can determine what action PC-DMIS takes.

Expressions are important to making PC-DMIS accomplish your specific tasks. When you use expressions in conjunction with flow control commands, you can unleash even more of PC-DMIS's powerful functionality.

This chapter explains how to create and use expressions inside the PC-DMIS Edit window. When you work with expressions, you should place the Edit window into Command mode. This allows you to view the Edit window code directly.

The following major topics are covered in this chapter:

• Using Expressions in a Measurement Routine

• Creating Expressions with the Expression Builder

• Using Variables with Expressions

• Understanding Expression Components

• Accessing a Report's Object Properties

• Accessing Information from a Constructed Scan Minimum Circle

If you're looking for information on Reporting Expressions, see the "About Report Expressions" in the "Reporting Measurement Results" chapter.