Send() Command (if zero flag) Resulting Keypress
{!} !
{#} #
{+} +
{^} ^
{{} {
{}} }
{SPACE} SPACE
{ENTER} ENTER key on the main keyboard
{ALT} ALT
{BACKSPACE} or {BS} BACKSPACE
{DELETE} or {DEL} DELETE
{UP} Up arrow
{DOWN} Down arrow
{LEFT} Left arrow
{RIGHT} Right arrow
{HOME} HOME
{END} END
{ESCAPE} or {ESC} ESCAPE
{INSERT} or {INS} INS
{PGUP} PageUp
{PGDN} PageDown
{F1} - {F12} Function keys
{TAB} TAB
{PRINTSCREEN} Print Screen key
{LWIN} Left Windows key
{RWIN} Right Windows key
{NUMLOCK on} NUMLOCK (on/off/toggle)
{CAPSLOCK off} CAPSLOCK (on/off/toggle)
{SCROLLLOCK toggle} SCROLLLOCK (on/off/toggle)
{BREAK} for Ctrl+Break processing
{PAUSE} PAUSE
{NUMPAD0} - {NUMPAD9} Numpad digits
{NUMPADMULT} Numpad Multiply
{NUMPADADD} Numpad Add
{NUMPADSUB} Numpad Subtract
{NUMPADDIV} Numpad Divide
{NUMPADDOT} Numpad period
{NUMPADENTER} Enter key on the numpad
{APPSKEY} Windows App key
{LALT} Left ALT key
{RALT} Right ALT key
{LCTRL} Left CTRL key
{RCTRL} Right CTRL key
{LSHIFT} Left Shift key
{RSHIFT} Right Shift key
{SLEEP} Computer SLEEP key
{ALTDOWN} Holds the ALT key down until {ALTUP} is sent
{SHIFTDOWN} Holds the SHIFT key down until {SHIFTUP} is sent
{CTRLDOWN} Holds the CTRL key down until {CTRLUP} is sent
{LWINDOWN} Holds the left Windows key down until {LWINUP} is sent
{RWINDOWN} Holds the right Windows key down until {RWINUP} is sent
{ASC nnnn} Send the ALT+nnnn key combination
{BROWSER_BACK} Select the browser "back" button
{BROWSER_FORWARD} Select the browser "forward" button
{BROWSER_REFRESH} Select the browser "refresh" button
{BROWSER_STOP} Select the browser "stop" button
{BROWSER_SEARCH} Select the browser "search" button
{BROWSER_FAVORITES} Select the browser "favorites" button
{BROWSER_HOME} Launch the browser and go to the home page
{VOLUME_MUTE} Mute the volume
{VOLUME_DOWN} Reduce the volume
{VOLUME_UP} Increase the volume
{MEDIA_NEXT} Select next track in media player
{MEDIA_PREV} Select previous track in media player
{MEDIA_STOP} Stop media player
{MEDIA_PLAY_PAUSE} Play/pause media player
{LAUNCH_MAIL} Launch the email application
{LAUNCH_MEDIA} Launch media player
{LAUNCH_APP1} Launch user app1
{LAUNCH_APP2} Launch user app2
{OEM_102} Either the angle bracket key or the backslash key on the RT 102-key keyboard

Send("{TAB}") Navigate to next control (button, checkbox, etc)
Send("+{TAB}") Navigate to previous control.
Send("^{TAB}") Navigate to next WindowTab (on a Tabbed dialog window)
Send("^+{TAB}") Navigate to previous WindowTab.
Send("{SPACE}") Can be used to toggle a checkbox or click a button.
Send("{+}") Usually checks a checkbox (if it's a "real" checkbox.)
Send("{-}") Usually unchecks a checkbox.
Send("{NumPadMult}") Recursively expands folders in a SysTreeView32.

Use Alt-key combos to access menu items. Also, open Notepad and try the following:
Send("!f") Send() Alt+f, the access key for Notepad's file menu. Try other letters!

Send("{DOWN}") Move down a menu.
Send("{UP}") Move up a menu.
Send("{LEFT}") Move leftward to new menu or expand a submenu.
Send("{RIGHT}") Move rightward to new menu or collapse a submenu.