Inno Setup built-in control names

I frequently find that I need the names of built-in controls e.g. WizardForm.StatusLabel. Is there a definitive reference to all the built-in control names somewhere, and if not, how do you go about finding these? As a worked example, how would I find the name of the control that shows the filename that is being extracted on the WizardForm.InstallingPage i.e. the label underneath the WizardForm.StatusLabel?