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;******************************************************************************
TITLE VKXD - Virtual Keyboard Device
;******************************************************************************
;
; (C) Copyright MICROSOFT Corp., 1990-1991
;
; Title: VKXD.ASM - Virtual Keyboard Extension Device
;
; Version: 3.00
;
; Date: 8-Oct-1990
;
; Author: Neil Sandlin
;
; This is a tiny little VxD to let you hit a function key and get the
; same effect as hitting "alt-enter"
;
;------------------------------------------------------------------------------
;
; Change log:
;
; DATE REV DESCRIPTION
; ----------- --- -----------------------------------------------------------
; 15-Apr-1991 bjm Added Cancel_Hot_Key_State in case of scanning normal
; keys. ALT-ENTER was a special case because it is also
; a hot key. Without Cancel_Hot_Key_State, normal keys
; would not be forced into a VM.
;
;==============================================================================
.386p
;******************************************************************************
; I N C L U D E S
;******************************************************************************
.XLIST
INCLUDE VMM.Inc
INCLUDE Debug.Inc
INCLUDE VKD.Inc
.LIST
Scan_F9 EQU 43h ; scan code for the "F9" key
;******************************************************************************
; V I R T U A L D E V I C E D E C L A R A T I O N
;******************************************************************************
Declare_Virtual_Device VKXD, 3, 0, VKXD_Control, Undefined_Device_ID ,,,
;******************************************************************************
; L O C A L D A T A
;******************************************************************************
VxD_LOCKED_DATA_SEG
; Scan codes
VKXD_Buffer db 038h ; alt (down)
db 01ch ; enter (down)
db 09ch ; enter (up)
db 0b8h ; alt (up)
VKXD_Buffer_Len equ $-VKXD_Buffer
VxD_LOCKED_DATA_ENDS
;******************************************************************************
; I N I T I A L I Z A T I O N C O D E
;******************************************************************************
VxD_ICODE_SEG
;******************************************************************************
;
; VKXD_Device_Init
;
; DESCRIPTION:
;
; This routine sets up the hot key call-back.
;
;
;==============================================================================
BeginProc VKXD_Device_Init
IFDEF DEBUG
Trace_Out "VKXD installed"
ENDIF
mov ax, Scan_F9 ; Hot key: scan code for F9
mov ebx,0 ; shift state: don't care
mov esi, OFFSET32 VKXD_HK_Handler ; address of our handler
mov cl, CallOnPress ; call when hot key is released
mov edx, 1 ; reference data - arbitrary
VxDCall VKD_Define_Hot_Key ; set up hot key
clc
ret
EndProc VKXD_Device_Init
VxD_ICODE_ENDS
;******************************************************************************
VxD_LOCKED_CODE_SEG
;******************************************************************************
;
; VKXD_Control
;
; DESCRIPTION:
;
; This is a call-back routine to handle the messages that are sent
; to VxD's to control system operation.
;
;
;==============================================================================
BeginProc VKXD_Control
Control_Dispatch Device_Init, VKXD_Device_Init
clc
ret
EndProc VKXD_Control
VxD_LOCKED_CODE_ENDS
VxD_CODE_SEG
;******************************************************************************
;
; VKXD_HK_Handler
;
; DESCRIPTION:
;
; This routine is called when the hot key is pressed. Its only
; function is to call VKD_Force_Keys to simulate an alt-enter.
;
; ENTRY:
;
; AL = scan code of key
; AH = 0, if key just pressed (Hot_Key_Pressed)
; = 1, if key just released (Hot_Key_Released)
; = 2, if key is an auto-repeat press (Hot_Key_Repeated)
; = 3, hot key state ended (Hot_Key_Completed)
; EBX is hot key handle
; ECX = global shift state
; EDX is reference data
; EDI = elapsed time for delayed notification (milliseconds)
; (normally 0, but if PriorityNotify is specified
; then this value could be larger)
;
;******************************************************************************
BeginProc VKXD_HK_Handler
VxDCall VKD_Cancel_Hot_Key_State ; turn off hotkey mode
mov ecx,VKXD_Buffer_Len
lea esi,VKXD_Buffer ; scan codes
VxDCall VKD_Force_Keys ; send to VM
IFDEF DEBUG
jnc SHORT kbd_ok
Trace_Out "VKXD: VKD force key error"
kbd_ok:
ENDIF
clc
ret
EndProc VKXD_HK_Handler
VxD_CODE_ENDS
END
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