用程序模拟键盘和鼠标键盘

模拟键盘我们用Keybd_event这个api函数，模拟鼠标按键用mouse_event函数。大家不用担心，在delphi里调用api函数是很方便的事。 　　
　　先介绍一下Keybd_event函数。Keybd_event能触发一个按键事件，也就是说回产生一个WM_KEYDOWN或WM_KEYUP消息。当然也可以用产生这两个消息来模拟按键，但是没有直接用这个函数方便。Keybd_event共有四个参数，第一个为按键的虚拟键值，如回车键为vk_return,　tab键为vk_tab。第二个参数为扫描码，一般不用设置，用0代替就行。第三个参数为选项标志，如果为keydown则置0即可，如果为keyup则设成“KEYEVENTF_KEYUP”，第四个参数一般也是置0即可。用如下代码即可实现模拟按下i键，其中的$49表示i键的虚拟键值：
keybd_event(VK_F11,0,0,0); keybd_event(VK_F11,0,KEYEVENTF_KEYUP,0); ... 　　
　　
　　mouse_event最好配合setcursorpos(x,y)函数一起使用，与Keybd_event类似，mouse_event有五个参数，第一个为选项标志，为MOUSEEVENTF_LEFTDOWN时表示左键按下，为MOUSEEVENTF_LEFTUP表示左键松开，向系统发送相应消息。第二三个参数分别表示x,y相对位置，一般可设为0,0,第四五个参数并不重要，一般也可设为0,0。若要得到Keybd_event和mouse_event函数的更详细的用法，可以查阅msdn或delphi帮助。下面是关于mouse_event的示例代码：　
SetCursorPos(20,132);mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0); mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0); ...
　　　上面的代码表示鼠标的双击，若要表示单击，用两个mouse_event即可(一次放下，一次松开)。 　　　　注意，不管是模拟键盘还是鼠标事件，都要注意还原，即按完键要松开，一个keydown对应一个keyup；鼠标单击　完也要松开， 不然可能影响程序的功能。 　

Virtual-Key Codes

The following table showsthe symbolic constant names, hexadecimal values, and mouse or keyboardequivalents for the virtual-key codes used by the system. The codes arelisted in numeric order.
Constants

VK_LBUTTON (01)
Left mouse button
VK_RBUTTON (02)
Right mouse button
VK_CANCEL (03)
Control-break processing
VK_MBUTTON (04)
Middle mouse button (three-button mouse)
VK_XBUTTON1 (05)
Windows 2000/XP: X1 mouse button
VK_XBUTTON2 (06)
Windows 2000/XP: X2 mouse button
- (07)
Undefined
VK_BACK (08)
BACKSPACE key
VK_TAB (09)
TAB key
- (0A-0B)
Reserved
VK_CLEAR (0C)
CLEAR key
VK_RETURN (0D)
ENTER key
- (0E-0F)
Undefined
VK_SHIFT (10)
SHIFT key
VK_CONTROL (11)
CTRL key
VK_MENU (12)
ALT key
VK_PAUSE (13)
PAUSE key
VK_CAPITAL (14)
CAPS LOCK key
VK_KANA (15)
Input Method Editor (IME) Kana mode
VK_HANGUEL (15)
IME Hanguel mode (maintained for compatibility; use VK_HANGUL)
VK_HANGUL (15)
IME Hangul mode
- (16)
Undefined
VK_JUNJA (17)
IME Junja mode
VK_FINAL (18)
IME final mode
VK_HANJA (19)
IME Hanja mode
VK_KANJI (19)
IME Kanji mode
- (1A)
Undefined
VK_ESCAPE (1B)
ESC key
VK_CONVERT (1C)
IME convert
VK_NONCONVERT (1D)
IME nonconvert
VK_ACCEPT (1E)
IME accept
VK_MODECHANGE (1F)
IME mode change request
VK_SPACE (20)
SPACEBAR
VK_PRIOR (21)
PAGE UP key
VK_NEXT (22)
PAGE DOWN key
VK_END (23)
END key
VK_HOME (24)
HOME key
VK_LEFT (25)
LEFT ARROW key
VK_UP (26)
UP ARROW key
VK_RIGHT (27)
RIGHT ARROW key
VK_DOWN (28)
DOWN ARROW key
VK_SELECT (29)
SELECT key
VK_PRINT (2A)
PRINT key
VK_EXECUTE (2B)
EXECUTE key
VK_SNAPSHOT (2C)
PRINT SCREEN key
VK_INSERT (2D)
INS key
VK_DELETE (2E)
DEL key
VK_HELP (2F)
HELP key
(30)
0 key
(31)
1 key
(32)
2 key
(33)
3 key
(34)
4 key
(35)
5 key
(36)
6 key
(37)
7 key
(38)
8 key
(39)
9 key
- (3A-40)
Undefined
(41)
A key
(42)
B key
(43)
C key
(44)
D key
(45)
E key
(46)
F key
(47)
G key
(48)
H key
(49)
I key
(4A)
J key
(4B)
K key
(4C)
L key
(4D)
M key
(4E)
N key
(4F)
O key
(50)
P key
(51)
Q key
(52)
R key
(53)
S key
(54)
T key
(55)
U key
(56)
V key
(57)
W key
(58)
X key
(59)
Y key
(5A)
Z key
VK_LWIN (5B)
Left Windows key (Microsoft Natural keyboard)
VK_RWIN (5C)
Right Windows key (Natural keyboard)
VK_APPS (5D)
Applications key (Natural keyboard)
- (5E)
Reserved
VK_SLEEP (5F)
Computer Sleep key
VK_NUMPAD0 (60)
Numeric keypad 0 key
VK_NUMPAD1 (61)
Numeric keypad 1 key
VK_NUMPAD2 (62)
Numeric keypad 2 key
VK_NUMPAD3 (63)
Numeric keypad 3 key
VK_NUMPAD4 (64)
Numeric keypad 4 key
VK_NUMPAD5 (65)
Numeric keypad 5 key
VK_NUMPAD6 (66)
Numeric keypad 6 key
VK_NUMPAD7 (67)
Numeric keypad 7 key
VK_NUMPAD8 (68)
Numeric keypad 8 key
VK_NUMPAD9 (69)
Numeric keypad 9 key
VK_MULTIPLY (6A)
Multiply key
VK_ADD (6B)
Add key
VK_SEPARATOR (6C)
Separator key
VK_SUBTRACT (6D)
Subtract key
VK_DECIMAL (6E)
Decimal key
VK_DIVIDE (6F)
Divide key
VK_F1 (70)
F1 key
VK_F2 (71)
F2 key
VK_F3 (72)
F3 key
VK_F4 (73)
F4 key
VK_F5 (74)
F5 key
VK_F6 (75)
F6 key
VK_F7 (76)
F7 key
VK_F8 (77)
F8 key
VK_F9 (78)
F9 key
VK_F10 (79)
F10 key
VK_F11 (7A)
F11 key
VK_F12 (7B)
F12 key
VK_F13 (7C)
F13 key
VK_F14 (7D)
F14 key
VK_F15 (7E)
F15 key
VK_F16 (7F)
F16 key
VK_F17 (80H)
F17 key
VK_F18 (81H)
F18 key
VK_F19 (82H)
F19 key
VK_F20 (83H)
F20 key
VK_F21 (84H)
F21 key
VK_F22 (85H)
F22 key
VK_F23 (86H)
F23 key
VK_F24 (87H)
F24 key
- (88-8F)
Unassigned
VK_NUMLOCK (90)
NUM LOCK key
VK_SCROLL (91)
SCROLL LOCK key
(92-96)
OEM specific
- (97-9F)
Unassigned
VK_LSHIFT (A0)
Left SHIFT key
VK_RSHIFT (A1)
Right SHIFT key
VK_LCONTROL (A2)
Left CONTROL key
VK_RCONTROL (A3)
Right CONTROL key
VK_LMENU (A4)
Left MENU key
VK_RMENU (A5)
Right MENU key
VK_BROWSER_BACK (A6)
Windows 2000/XP: Browser Back key
VK_BROWSER_FORWARD (A7)
Windows 2000/XP: Browser Forward key
VK_BROWSER_REFRESH (A8)
Windows 2000/XP: Browser Refresh key
VK_BROWSER_STOP (A9)
Windows 2000/XP: Browser Stop key
VK_BROWSER_SEARCH (AA)
Windows 2000/XP: Browser Search key
VK_BROWSER_FAVORITES (AB)
Windows 2000/XP: Browser Favorites key
VK_BROWSER_HOME (AC)
Windows 2000/XP: Browser Start and Home key
VK_VOLUME_MUTE (AD)
Windows 2000/XP: Volume Mute key
VK_VOLUME_DOWN (AE)
Windows 2000/XP: Volume Down key
VK_VOLUME_UP (AF)
Windows 2000/XP: Volume Up key
VK_MEDIA_NEXT_TRACK (B0)
Windows 2000/XP: Next Track key
VK_MEDIA_PREV_TRACK (B1)
Windows 2000/XP: Previous Track key
VK_MEDIA_STOP (B2)
Windows 2000/XP: Stop Media key
VK_MEDIA_PLAY_PAUSE (B3)
Windows 2000/XP: Play/Pause Media key
VK_LAUNCH_MAIL (B4)
Windows 2000/XP: Start Mail key
VK_LAUNCH_MEDIA_SELECT (B5)
Windows 2000/XP: Select Media key
VK_LAUNCH_APP1 (B6)
Windows 2000/XP: Start Application 1 key
VK_LAUNCH_APP2 (B7)
Windows 2000/XP: Start Application 2 key
- (B8-B9)
Reserved
VK_OEM_1 (BA)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the ';:' key

VK_OEM_PLUS (BB)
Windows 2000/XP: For any country/region, the '+' key
VK_OEM_COMMA (BC)
Windows 2000/XP: For any country/region, the ',' key
VK_OEM_MINUS (BD)
Windows 2000/XP: For any country/region, the '-' key
VK_OEM_PERIOD (BE)
Windows 2000/XP: For any country/region, the '.' key
VK_OEM_2 (BF)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '/?' key

VK_OEM_3 (C0)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '`~' key

- (C1-D7)
Reserved
- (D8-DA)
Unassigned
VK_OEM_4 (DB)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '[{' key

VK_OEM_5 (DC)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '\&line;' key

VK_OEM_6 (DD)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the ']}' key

VK_OEM_7 (DE)
Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the 'single-quote/double-quote' key

VK_OEM_8 (DF)
Used for miscellaneous characters; it can vary by keyboard.
- (E0)
Reserved
(E1)
OEM specific
VK_OEM_102 (E2)
Windows 2000/XP: Either the angle bracket key or the backslash key on the RT 102-key keyboard
(E3-E4)
OEM specific
VK_PROCESSKEY (E5)
Windows 95/98/Me, Windows NT 4.0, Windows 2000/XP: IME PROCESS key
(E6)
OEM specific
VK_PACKET (E7)
Windows 2000/XP:Used to pass Unicode characters as if they were keystrokes. TheVK_PACKET key is the low word of a 32-bit Virtual Key value used fornon-keyboard input methods. For more information, see Remark in KEYBDINPUT, SendInput, WM_KEYDOWN, and WM_KEYUP
- (E8)
Unassigned
(E9-F5)
OEM specific
VK_ATTN (F6)
Attn key
VK_CRSEL (F7)
CrSel key
VK_EXSEL (F8)
ExSel key
VK_EREOF (F9)
Erase EOF key
VK_PLAY (FA)
Play key
VK_ZOOM (FB)
Zoom key
VK_NONAME (FC)
Reserved
VK_PA1 (FD)
PA1 key
VK_OEM_CLEAR (FE)
Clear key