How to close a modal dialog form

Hi, Is there a method available to close a modal dialog form that was launched with e.g. through top.aras.modalDialogHelper.show(...)? Also is there a reference that describes the different methods that are available in the Aras class? In the sample codes there are a lot of methods used that aren't included in the available documentation, e.g:

• top.aras.modalDialogHelper.show
• topWnd.ArasModules.Dialog.show
• aras.getMostTopWindowWithAras
• etc.

Thank you for your help!