Implementing "Cancel All Edits" for a Configuration-type Form in Delphi

in Delphi VCL ::
Configuration forms often have a cancel button used to revert any edits to the edit controls back to original (initial) values. Here's how to implement such a mechanism in Delphi applications.

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Related:

• Control Owner vs. Parent
• Communicating Between Forms
• Set event handlers to controls NOT being inherited from a common ancestor