VKD_Get_Msg

VKD_Get_Msg_Key

include vkd.inc

VxDcall VKD_Get_Msg_Key
jz      no_key_avaliable

Returns the next available key from the special message mode input buffer, and removes it from the buffer. The zero flag is clear if a key is available; otherwise, it is set. This service does not block. Uses EAX and Flags.

Returns the scan code in AL if the zero flag is clear, and a combination of these flags in AH:

Value	Meaning
MK_Alt	An ALT key is down.
MK_Ctrl	A CTRL key is down.
MK_Extended	The key is an extended key.
MK_Shift	A SHIFT key is down.

VMHandle

Handle of the virtual machine.