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)
24 return MouseButtonsStates[0];
26 return MouseButtonsStates[1];
28 return MouseButtonsStates[2];
30 retval = ( (INT)(KeyStateTable[keycode] & 0x80) << 8 ) |
31 (INT)(KeyStateTable[keycode] & 0x01);
37 /**********************************************************************
38 * GetKeyboardState [USER.222]
40 void GetKeyboardState(BYTE FAR *lpKeyState)
42 if (lpKeyState != NULL) {
43 KeyStateTable[VK_LBUTTON] = MouseButtonsStates[0];
44 KeyStateTable[VK_MBUTTON] = MouseButtonsStates[1];
45 KeyStateTable[VK_RBUTTON] = MouseButtonsStates[2];
46 memcpy(lpKeyState, KeyStateTable, 256);
50 /**********************************************************************
51 * SetKeyboardState [USER.223]
53 void SetKeyboardState(BYTE FAR *lpKeyState)
55 if (lpKeyState != NULL) {
56 memcpy(KeyStateTable, lpKeyState, 256);
57 MouseButtonsStates[0] = KeyStateTable[VK_LBUTTON];
58 MouseButtonsStates[1] = KeyStateTable[VK_MBUTTON];
59 MouseButtonsStates[2] = KeyStateTable[VK_RBUTTON];
63 /**********************************************************************
64 * GetAsyncKeyState (USER.249)
66 * Determine if a key is or was pressed. retval has high-order
67 * byte set to 1 if currently pressed, low-order byte 1 if key has
70 * This uses the variable AsyncMouseButtonsStates and
71 * AsyncKeyStateTable (set in event.c) which have the mouse button
72 * number or key number (whichever is applicable) set to true if the
73 * mouse or key had been depressed since the last call to
76 int GetAsyncKeyState(int nKey)
82 retval = AsyncMouseButtonsStates[0] |
83 (MouseButtonsStates[0] << 8);
86 retval = AsyncMouseButtonsStates[1] |
87 (MouseButtonsStates[1] << 8);
90 retval = AsyncMouseButtonsStates[2] |
91 (MouseButtonsStates[2] << 8);
94 retval = AsyncKeyStateTable[nKey] |
95 (KeyStateTable[nKey] << 8);
99 memset( AsyncMouseButtonsStates, 0, 3 ); /* all states to false */
100 memset( AsyncKeyStateTable, 0, 256 );