The StatusBar is part of the Form Properties.
By default the Tab/Fields in the Properties toolwindow is set to 0, meaning there is no StatusBar added to your form.
Change this number to higher than 0 to enable the StatusBar with the number of Tabs/Fields you wish displayed.
If you are creating a resizable Form, you can have the StatusBar automatically resize with the Form by checking the Autosize Statusbar option.
Once Tabs/Fields have been added to a StatusBar, the Tabs/Fields toolwindow will display the name of each field along with the field size. To edit this information, double click on the appropriate field with the left mouse button.
To Insert or Delete StatusBar Tabs/Fields, use the Insert or Delete keys.