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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 通過api和鍵盤鉤子徹底屏蔽任務條和開始菜單

通過api和鍵盤鉤子徹底屏蔽任務條和開始菜單

編輯:Delphi

  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.

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