The Manifest Generation and Editing Tool (Mage.exe) is a command-line tool that supports the creation and editing of application and deployment manifests for Windows applications.
The Manifest Generation and Editing Tool (Mage.exe) is a command-line tool that supports the creation and editing of application and deployment manifests for Microsoft ClickOnce deployment of applications.
A graphical client (MageUI.exe) exists for this tool.
More information is available on MSDN.