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include vkd.inc VxDcall VKD_Get_Msg_Key |
The VKD_Get_Msg_Key service returns the next available key from the special message mode input buffer, and removes it from the buffer. If no key is available, then the zero flag is set.
This service does not block.
EBX
Specifies the virtual machine handle.
The zero flag is clear if a key is read. The AL register contains the scan code and the AH register contains a combination of the following modifier flag values:
| 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. |
The zero flag is set if no key is available.
EAX, Flags