20.26. Sending a Keystroke Combination to a Specified Guest Virtual machine

linux - choosing this option causes the symbolic names to match the corresponding Linux key constant macro names and the numeric values are those offered by the Linux generic input event subsystems.

xt - this will send a value that is defined by the XT keyboard controller. No symbolic names are provided

atset1 - the numeric values are those that are defined by the AT keyboard controller, set1 (XT compatible set). Extended keycodes from the atset1 may differ from extended keycodes in the XT codeset. No symbolic names are provided.

atset2 - The numeric values are those defined by the AT keyboard controller, set 2. No symbolic names are provided.

atset3 - The numeric values are those defined by the AT keyboard controller, set 3 (PS/2 compatible). No symbolic names are provided.

os_x - The numeric values are those defined by the OS-X keyboard input subsystem. The symbolic names match the corresponding OS-X key constant macro names.

xt_kbd - The numeric values are those defined by the Linux KBD device. These are a variant on the original XT codeset, but often with different encoding for extended keycodes. No symbolic names are provided.

win32 - The numeric values are those defined by the Win32 keyboard input subsystem. The symbolic names match the corresponding Win32 key constant macro names.

usb - The numeric values are those defined by the USB HID specification for keyboard input. No symbolic names are provided.

rfb - The numeric values are those defined by the RFB extension for sending raw keycodes. These are a variant on the XT codeset, but extended keycodes have the low bit of the second bite set, instead of the high bit of the first byte. No symbolic names are provided.