I would like to rename the buttons in our application and adjust their labels to more common and popular names. Unfortunately I don't know how would be a good label term for our button called currently RESET. The functionality behind: the button makes undo all changes and reload the currently edited dataset into the current dialog again. In fact, it is a complete UNDO for all editing steps on currently load dataset. Unfortunately I cannot use UNDO, because an UNDO reverses only the last step. Probably UNDO ALL? Of course, RESET is the wrong term here. :-)
I believe that in a "normal" MS Windows screen, "Clear" is used to reset the screen to its starting state, while "Cancel" is used to close the screen and cancel any pending actions, if that's any help.