Thanks, I have found the answer yet.

It's answer:
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.

// Full explanation is here
http://msdn2.microsoft.com/en-us/lib...tc(VS.80).aspx