Styles are defined as classes in a CSS file. Every control style must be named tibfr_ctrl_class_name, where
class_name can be any string value. The class name convention allows custom styles to be added to the Style dropdown list in the correct sort order.
TIBCO BusinessWorks FormBuilder uses subclasses to organize form elements. Each subclass represents a type of interface element, such as a caption. A style definition combines the classes you define with provided subclasses.
Each style to apply to controls should override all control subclasses listed in Table 9. If a style is not defined for a control subclass, the layout subclass is used at runtime. For examples of how to implement custom styles, see the default style definitions provided in a Stylesheet resource.