install an icon in the Windows task bar

[Crystal]

I have a dialog-based application. I would like to have an icon displayed in the task bar, on the right edge near the clock, when user boots up the windows operating system. So when user moves mouse over the icon, some explanatory words will be displayed; or when user left-click the icon, the program will be executed. Is this possible? If it is, how? Please help. Sample codes would be most appreciated. Thank you.