Specifies a condition that must be satisfied (evaluate to True) at installation time on a target computer. The Condition property can be used to add conditional logic to an installer, for example, installing a file only for a specific operating system version. It can also be used in conjunction with a file, registry, or component search to terminate installation if a specified item is not found.
Conditions apply to files and components, not to folders. You can set a condition on a folder, but the condition will be ignored unless the folder is empty and its AlwaysCreate property is set to True. In this case, a dummy component will be created for the folder and the condition will be set on that component.
The Condition property takes a string containing a valid conditional statement that can be evaluated as True or False. This statement can be a Windows Installer condition or property, the value contained in the Property property, the Name property of a file, registry, or component search, or a combination of the preceding statements using logical operators.
For example, your setup project contains a Checkboxes dialog with a checkbox called CheckBox1, and CheckBox1Property is CHECKBOXA1. To determine whether the user has selected CheckBox1, you could set the Condition Property to the expression CHECKBOXA1=1. For more information see the step "To add a launch condition to check the Internet Explorer version" in Walkthrough: Deploying a Windows-based Application.
The Condition property is used in conjunction with the setting of launch conditions as described in Launch Condition Management in Deployment.