SendKeys supports the Visual Basic SendKeys syntax, as documented below.

Supported modifiers:

+ = Shift
^ = Control
% = Alt

Surround sequences of characters or key names with parentheses in order to
modify them as a group.  For example, '+abc' shifts only 'a', while '+(abc)' shifts
all three characters.

Supported special characters

~ = Enter
( = Begin modifier group (see above)
) = End modifier group (see above)
{ = Begin key name text (see below)
} = End key name text (see below)

Supported characters:

Any character that can be typed is supported.  Surround the modifier keys
listed above with braces in order to send as normal text.

Supported key names (surround these with braces):

BKSP, BS, BACKSPACE
BREAK
CAPSLOCK
CLEAR
DEL
DELETE
DOWN
END
ENTER
ESC
ESCAPE
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
F13
F14
F15
F16
HELP
HOME
INS
LEFT
NUMLOCK
PGDN
PGUP
PRTSC
RIGHT
SCROLLLOCK
TAB
UP

Follow the keyname with a space and a number to send the specified key a
given number of times (e.g., {left 6}).
