2 * Keyboard related functions
4 * Copyright 1993 Bob Amstadt
10 extern BOOL MouseButtonsStates[3];
11 extern BOOL AsyncMouseButtonsStates[3];
12 extern BYTE KeyStateTable[256];
13 extern BYTE AsyncKeyStateTable[256];
15 /**********************************************************************
16 * GetKeyState [USER.106]
18 int GetKeyState(int keycode)
22 return MouseButtonsStates[0];
24 return MouseButtonsStates[1];
26 return MouseButtonsStates[2];
28 return KeyStateTable[keycode];
32 /**********************************************************************
33 * GetKeyboardState [USER.222]
35 void GetKeyboardState(BYTE FAR *lpKeyState)
37 if (lpKeyState != NULL) {
38 KeyStateTable[VK_LBUTTON] = MouseButtonsStates[0];
39 KeyStateTable[VK_MBUTTON] = MouseButtonsStates[1];
40 KeyStateTable[VK_RBUTTON] = MouseButtonsStates[2];
41 memcpy(lpKeyState, KeyStateTable, 256);
45 /**********************************************************************
46 * SetKeyboardState [USER.223]
48 void SetKeyboardState(BYTE FAR *lpKeyState)
50 if (lpKeyState != NULL) {
51 memcpy(KeyStateTable, lpKeyState, 256);
52 MouseButtonsStates[0] = KeyStateTable[VK_LBUTTON];
53 MouseButtonsStates[1] = KeyStateTable[VK_MBUTTON];
54 MouseButtonsStates[2] = KeyStateTable[VK_RBUTTON];
58 /**********************************************************************
59 * GetAsyncKeyState (USER.249)
61 * Determine if a key is or was pressed. retval has high-order
62 * byte set to 1 if currently pressed, low-order byte 1 if key has
65 * This uses the variable AsyncMouseButtonsStates and
66 * AsyncKeyStateTable (set in event.c) which have the mouse button
67 * number or key number (whichever is applicable) set to true if the
68 * mouse or key had been depressed since the last call to
71 int GetAsyncKeyState(int nKey)
77 retval = AsyncMouseButtonsStates[0] |
78 (MouseButtonsStates[0] << 8);
81 retval = AsyncMouseButtonsStates[1] |
82 (MouseButtonsStates[1] << 8);
85 retval = AsyncMouseButtonsStates[2] |
86 (MouseButtonsStates[2] << 8);
89 retval = AsyncKeyStateTable[nKey] |
90 (KeyStateTable[nKey] << 8);
94 memset( AsyncMouseButtonsStates, 0, 3 ); /* all states to false */
95 memset( AsyncKeyStateTable, 0, 256 );