ScancodeViewer is a utility for viewing key scancodes and names on Windows. This tool is meant to be of use in creating scancode maps to remap keys. In the Scancode Map registry entry, keys can be remapped by listing the scan codes to remap to and from, respectively. The program can be terminated by pressing Ctrl-C.

For instance, if a user wished to remap Caps Lock (scancode 0x3a) to Esc (scancode 0x01), they would set HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout\Scancode Map to a REG_BINARY value of

00 00 00 00 (Version Information)
00 00 00 00 (Flags)
02 00 00 00 (Number of Mappings including Null Terminator)
01 00 3a 00 (Individual Mapping)
00 00 00 00 (Null Terminator)