C语言实现模拟键盘输入

C语言实现模拟键盘输入
keybd_event function
Synthesizes a keystroke. The system can use such a synthesized keystroke to generate a WM_KEYUP or WM_KEYDOWN message. The keyboard driver's interrupt handler calls the keybd_event function.
Note This function has been superseded. Use SendInput instead.
Syntax
C++
VOID WINAPI keybd_event(
_In_ BYTE bVk,
_In_ BYTE bScan,
_In_ DWORD dwFlags,
_In_ ULONG_PTR dwExtraInfo
);
Parameters
bVk [in]
Type: BYTE
A virtual-key code. The code must be a value in the range 1 to 254. For a complete list, see Virtual Key Codes.
bScan [in]
Type: BYTE
A hardware scan code for the key.
dwFlags [in]
Type: DWORD
Controls various aspects of function operation. This parameter can be one or more of the following values.
Value Meaning
KEYEVENTF_EXTENDEDKEY 0x0001 If specified, the scan code was preceded by a prefix byte having the value 0xE0 (224).
KEYEVENTF_KEYUP 0x0002 If specified, the key is being released. If not specified, the key is being depressed.
dwExtraInfo [in]
Type: ULONG_PTR
An additional value associated with the key stroke. Return value
This function does not return a value.
Remarks
An application can simulate a press of the PRINTSCRN key in order to obtain a screen snapshot and save it to the clipboard. To do this, call keybd_event with the bVk parameter set to VK_SNAPSHOT.
Examples
The following sample program toggles the NUM LOCK light by using keybd_event with a virtual key of VK_NUMLOCK. It takes a Boolean value that indicates whether the light should be turned off (FALSE) or on (TRUE). The same technique can be used for the CAPS LOCK key (VK_CAPITAL) and the SCROLL LOCK key (VK_SCROLL).
#include <windows.h>
void SetNumLock( BOOL bState )
{
BYTE keyState[256];
GetKeyboardState((LPBYTE)&keyState);
if( (bState && !(keyState[VK_NUMLOCK] & 1)) || (!bState && (keyState[VK_NUMLOCK] & 1)) )
{
// Simulate a key press
keybd_event( VK_NUMLOCK,
0x45,
KEYEVENTF_EXTENDEDKEY | 0,
0 );
// Simulate a key release
keybd_event( VK_NUMLOCK,
0x45,
KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP,
0);
}
}
void main()
{
SetNumLock( TRUE );
}
Requirements
Minimum supported
client Windows 2000 Professional [desktop apps only]
Minimum supported
Windows 2000 Server [desktop apps only] server
Header Winuser.h (include Windows.h)
Library User32.lib
DLL User32.dll
Scan Codes
Key Scan Code
~ ` 29
! 1 2
@ 2 3
# 3 4
$ 4 5
% 5 6
^ 6 7
& 7 8
* 8 9
( 9 0A
) 0 0B
_ - 0C
+ = 0D
Backspace 0E
Tab 0F
Q 10
W 11
E 12
R 13
T 14
Y 15
U 16
I 17
O 18
P 19
{ [ 1A
} ] 1B
| \ 2B Caps Lock 3A A 1E
S 1F
D 20
F 21
G 22
H 23
J 24
K 25
L 26
: ; 27
“ ' 28 Enter 1C
L SHIFT 2A
Z 2C
X 2D
C 2E
V 2F
B 30
N 31
M 32
< , 33
> . 34
/ 35
R SHIFT 36
L CTRL 1D
L ALT 38
Space Bar 39
R ALT E0 38
R CTRL E0 1D Insert E0 52 Delete E0 53
L Arrow E0 4B Home E0 47
End E0 4F
Up Arrow E0 48 Dn Arrow E0 50 Page Up E0 49 Page Down E0 51 R Arrow E0 4D Num Lock 45 Numeric 7 47 Numeric 4 4B Numeric 1 4F Numeric / E0 35 Numeric 8 48 Numeric 5 4C Numeric 2 50 Numeric 0 52 Numeric * 37 Numeric 9 49 Numeric 6 4D Numeric 3 51 Numeric . 53
Numeric - 4A Numeric + 4E Numeric Enter E0 1C
Esc 1
F1 3B
F2 3C
F3 3D
F4 3E
F5 3F
F6 40
F7 41
F8 42
F9 43
F10 44
F11 57
F12 58
Print Screen ??
Scroll Lock 46
Pause ??
Left Win E0 5B Right Win E0 5C Application E0 5D ACPI Power E0 5E ACPI Sleep E0 5F ACPI Wake E0 63。