Swap left control and caps lock in Windows.

swap-capslock-control.reg

Windows Registry Editor Version 5.00

; The hex data is in five groups of four bytes:
;   00,00,00,00,\    header version (always 00000000)
;   00,00,00,00,\    header flags (always 00000000)
;   02,00,00,00,\    # of entries (2 in this case) plus a NULL terminator line.
;                    Entries are in 2-byte pairs: Key code to send & keyboard key to send it.
;                    Each entry is in LSB, MSB order.
;   1d,00,3a,00,\    Send LEFT CTRL (0x001d) code when user presses the CAPS LOCK key (0x003a) 
;   3a,00,1d,00,\    Send CAPS LOCK (0x3A) code when user presses the LEFT CTRL key (0x001d) 
;   00,00,00,00      NULL terminator

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout]
"Scancode Map"=hex:00,00,00,00,\
                   00,00,00,00,\
                   04,00,00,00,\
                   1d,00,3a,00,\
                   3a,00,1d,00,\
                   00,00,00,00

Thanks!