He typed it in, the clicks of the keys echoing like gunshots. He hit Enter. The gray box vanished, replaced by the familiar green and white cells of the spreadsheet. The "Protected by XLS Padlock" banner remained, but the gates were open.
The activation code system in XLS Padlock serves as a licensing mechanism. Instead of distributing an open file, you distribute a locked application. When a user opens the compiled EXE, they are prompted for a code. xls padlock activation code
Two possibilities: