查看: 11831|回复: 3

用Delphi写的低级键盘钩子！

[复制链接]

字体大小: 正常放大

ilikenba

1万主题	49 听众	2万积分

TA的每日心情

	奋斗 2024-6-23 05:14

签到天数: 1043 天

[LV.10]以坛为家III

群组: 万里江山

群组: sas讨论小组

群组: 长盛证券理财有限公司

群组: C 语言讨论组

群组: Matlab讨论组

电梯直达

1^#

发表于 2004-9-24 21:12 |只看该作者 |倒序浏览

|招呼Ta 关注Ta

<

>implementation</P>
<

>uses IniOper, TMain;
//-----------------------------------------------------------------
type
  LPByte=PByte;
  PKBDLLHOOKSTRUCT =^KBDLLHOOKSTRUCT;
  KBDLLHOOKSTRUCT=record
   vkCode: DWORD;
   scanCode

WORD;
flags

WORD;
time

WORD;
   dwExtraInfDWORD;
  end;
const
   LLKHF_ALTDOWN=KF_ALTDOWN shr 8;
   WH_KEYBOARD_LL=13;
var
hhkNTKeyboard: HHOOK;
function TSysOper.GetWinVer:Byte;//获取windows操作系统的版本
var
OS:TOSVersionInfo;
begin
  Result:=0;
  OS.dwOSVersionInfoSize:=SizeOf(TOSVersionInfo);
  GetVersionEx(OS);
  case OS.dwPlatformId of
   VER_PLATFORM_WIN32s : Result:=0;//Windows 3.1x/32s
   VER_PLATFORM_WIN32_WINDOWS : Result:=1;//Windows95
   VER_PLATFORM_WIN32_NT : Result:=2;//Windows NT
  end;
end;
function LowLevelKeyboardFunc(nCode:Integer;w_Param:WPARAM;l_Param

PARAM)

RESULT;stdcall;
var
blEatKeystroke:Boolean;
P

KBDLLHOOKSTRUCT;
begin
  blEatKeystroke:=false;
  if nCode=HC_ACTION then
  begin
case w_Param of
   WM_KEYDOWN,
   WM_SYSKEYDOWN,
   WM_KEYUP,
   WM_SYSKEYUP:
      begin
         P:=PKBDLLHOOKSTRUCT(l_Param);
         blEatKeystroke:=(((p^.vkCode=VK_TAB) and
                        ((p^.flags and LLKHF_ALTDOWN)<>0)) or
                        (p^.vkCode=VK_LWIN) or
                        (p^.vkCode=VK_RWIN) or
                        ((p^.vkCode=VK_ESCAPE) and
                        ((p^.flags and LLKHF_ALTDOWN)<>0)) or
                        ((p^.vkCode=VK_ESCAPE) and
                        ((GetKeyState(VK_CONTROL) and $8000)<>0)) or
                        ((p^.vkCode=VK_DELETE) and
                        ((p^.flags and LLKHF_ALTDOWN)<>0) and
                        ((GetKeyState(VK_CONTROL) and $8000)<>0)));
      end;
end;
  end;
  if blEatKeystroke then
  begin
   Result:=1;
  end
  else
   Result:=CallNextHookEx(0,nCode,w_Param,l_Param);
end;</P>
<

>function TSysOper.LoadHook():Boolean;
var
Temp:Integer;
begin
Result:=false;
if GetWinVer=2 then
begin
hhkNTKeyboard:= SetWindowsHookEx(WH_KEYBOARD_LL,LowLevelKeyboardFunc,HInstance,0);
if hhkNTKeyboard=0 then
Result:=false
else
Result:=true;
end
else
begin
SystemParametersInfo(SPI_SCREENSAVERRUNNING,1,@Temp,1);
Result:=true;
end;
end;</P>

zan