One program can set a variable that another program can test. An extensive logging facilities can monitor and record what's happening in your home. Home Control Assitant makes full use of the 32 bit operating system to create a robust implementation. Wizards guide you through most operations with clear, easy to follow instructions. User interface uses staged complexity.
HCA wizards create objects with reasonable defaults.
Advanced properties available but only when you want them. Floor plans of your home can be displayed using DXF files. The system can automatically correct the computer's system clock by using a modem to call a telephone time service. This function can be scheduled to happen every week, every 2nd week, etc. PC clocks drift over time and this ensures scheduled events happen when you mean them to.