procedure WizardSelectComponents(const Components: String);
Selects the specified comma separated list of component names.
If a component name is prefixed with a "*" character, any child components will be selected as well (except for those that include the dontinheritcheck flag). If a component name is prefixed with a "!" character, the component will be deselected.
This function does not change the state of unspecified components. This function can change the state of specified components that include the fixed flag.
begin
WizardSelectComponents('!helpfiles');
// the 'helpfiles' component is deselected
end;