在一些碰到過的多媒體軟件編制過程中通常需要徹底屏蔽任務條，通常的辦法是調用ShowWindow(h,SW_hide)來隱藏任務條，但是不能屏蔽開始菜單，通過鍵盤的win功能鍵還是可以打開開始菜單，所以配合鍵盤鉤子，來屏蔽開始菜單。
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; //隱藏-顯示任務條
var
h:THandle;
begin
if yc = True then
begin
h:=FindWindow('Shell_TrayWnd',nil);
ShowWindow(h,SW_hide); //隱藏任務條
end
else
begin
h:=FindWindow('Shell_TrayWnd',nil);
ShowWindow(h,SW_SHOW); //顯示任務條
end;
Result:=true;
end;
function keyHookProc(nCode: Integer;WParam: WPARAM;LParam: LPARAM): LRESULT;stdcall;
//調用鍵盤鉤子，屏蔽左右win功能鍵
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: //按鍵後判斷所按鍵
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: //松開按鍵後判斷所按鍵
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 //如果為WIN功能鍵則屏蔽
else
Result:= CallNextHookEx(hHk,nCode,WParam,LParam); //其他鍵放下一個鉤子
end
end;
function Enablehide:Boolean;stdcall;export; //外部調用
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; //外部調用
begin
if hHk <> 0 then
begin
UnHookWindowsHookEx(hHk);
hHk := 0;
Result := True;
end
else
Result := False;
ycxsks(False);
end;
exports
Enablehide,
Disablehide;
end
