通过api和键盘钩子彻底屏蔽任务栏和开始菜

通过api和键盘钩子彻底屏蔽任务栏和开始菜

在一些碰到过的多媒体软件编制过程中通常需要彻底屏蔽任务条，通常的办法是调用ShowWindow(h,SW_hide)来隐藏任务条，但是不能屏蔽开始菜单，通过键盘的win功能键还是可以打开开始菜单，所以配合键盘钩子，来屏蔽开始菜单。

library

HIDE;

{ Important note about DLL memory management: ShareMem must be

the

first unit in your library\'s USES clause AND your project\'s

(select

Project-View Source) USES clause if your DLL exports any procedures

or

functions that pass strings as parameters or function results.

This

applies to all strings passed to and from your DLL--even those

that

are nested in records and classes. ShareMem is the interface unit

to

the BORLNDMM.DLL shared memory manager, which must be deployed

along

with your DLL. To avoid using BORLNDMM.DLL, pass string

information

using PChar or ShortString parameters.

}

uses

SysUtils,

Classes,

windows,

messages;

var

hHk

:HHOOK;

type

PKBDLLHOOKSTRUCT = ^KBDLLHOOKSTRUCT;

KBDLLHOOKSTRUCT

= record

vkCode: DWORD;

ScanCode: DWORD;

Flags: DWORD;

Time:

DWORD;

dwExtraInfo: DWORD;

end;

{$R *.res}

function ycxsks(

yc:Boolean): Boolean;stdcall;

//隐藏-显示任务条

var

h:THandle;

begin

if yc = True

then

begin

h:=FindWindow(\'Shell_TrayWnd\',nil);

ShowWindow(h,SW_hide);

//隐藏任务条

end

else

begin

h:=FindWindow(\'Shell_TrayWnd\',nil);

ShowWindow(h,SW_SHOW);

//显示任务条

end;

Result:=true;

end;

function keyHookProc(nCode:

Integer;WParam: WPARAM;LParam: LPARAM):

LRESULT;stdcall;

//调用键盘钩子，屏蔽左右win功能键

var

p:

PKBDLLHOOKSTRUCT;

y: integer;

begin

if nCode<0

then

Result:=

CallNextHookEx(hHk,nCode,WParam,LParam)

else

begin

y :=

0;

case WParam of

WM_KEYDOWN,WM_SYSKEYDOWN:

//按键后判断所按键

begin

p:=PKBDLLHOOKSTRUCT(Lparam);

if p^.vkCode =

VK_LWIN then

y := 1;

if p^.vkCode = VK_RWIN then

y :=

1;

end;

WM_KEYUP,WM_SYSKEYUP:

//松开按键后判断所按键

begin

p:=PKBDLLHOOKSTRUCT(Lparam);

if p^.vkCode =

VK_LWIN then

y := 1;

if p^.vkCode = VK_RWIN then

y :=

1;

end;

end;

if y=1 then

Result:=1

//如果为WIN功能键则屏蔽

else

Result:= CallNextHookEx(hHk,nCode,WParam,LParam);

//其他键放下一个钩子

end

end;

function Enablehide:Boolean;stdcall;export;

//外部调用

begin

if hHk = 0 then

begin

hHk :=

SetWindowsHookEx(13,@keyHookProc,HInstance,0);

Result :=

True;

end

else

Result :=

False;

ycxsks(true);

end;

function Disablehide:Boolean; stdcall;

export; //外部调用

begin

if hHk <> 0

then

begin

UnHookWindowsHookEx(hHk);

hHk := 0;

Result :=

True;

end

else

Result :=

False;

ycxsks(False);

end;

exports

Enablehide,

Disablehide;

end