inno-setup – 使用Inno Setup取消任务栏中的应用程序,startmenu

procedure zylPinAppToTaskbar(strPath,strApp: string);  
var  
  vShell,vFolder,vFolderItem,vItemVerbs: Variant;  
  vPath,vApp: Variant;
  i: Integer;
  sItem: String;
  h: LongInt;
  szPinName: String;
  filenameEnd : Integer;
  filename    : String;
  strEnd    : String;
begin 
  SetLength(szPinName,255);
  h := LoadLibrary(ExpandConstant('{sys}Shell32.dll'));
  LoadString(h,5386,szPinName,255);
  FreeLibrary(h);
  strEnd := #0;
  filenameEnd := Pos(strEnd,szPinName);
  filename := Copy(szPinName,1,filenameEnd - 1);
  if (Length(filename) > 0) then  //WinXp or lower,no pin taskbar function
  begin
    vShell := CreateOleObject('Shell.Application');
    vPath := strPath;
    vFolder := vShell.NameSpace(vPath);
    vApp := strApp;
    vFolderItem := vFolder.ParseName(vApp);
    vItemVerbs := vFolderItem.Verbs;

  for i := 1 to vItemVerbs.Count do
  begin
    sItem := vItemVerbs.Item(i).Name;

    if (sItem = filename) then
    begin
      // 63 63 72 75 6E 2E 63 6F 6D
      vItemVerbs.Item(i).DoIt;
      break;
     end;
    end;
  end;
end;

这真是一种hacky方式(我不会依赖).现在让我们关注它实际上做了什么.该函数加载Shell32.dll库并从其字符串表中读取属于将此程序固定到任务栏功能的弹出菜单项的标题(并将其存储到文件名变量中).然后它连接到Shell并为传递的文件夹路径(vFolder变量)创建Folder对象.对于此文件夹对象,它然后创建FolderItem对象(vFolderItem变量),并在此对象上迭代所有可用的动词(vItemVerbs变量)并检查Name是否与从Shell32.dll库中读取的名称匹配.如果找到一个,它将通过DoIt方法调用该操作并中断迭代.

现在,如果您知道上面代码的作用,您可以猜测执行取消固定操作时唯一需要做的就是找到该功能的弹出菜单项的标题.我查看了Shell32.dll库的字符串表,并且从任务栏字符串取消固定此程序的ID为5387,因此修改上述取消固定功能的唯一方法是更改??此行：

// this magical 5386 value is the ID of the "Pin this program to taskbar"
// popup menu caption string in the Shell32.dll string table
LoadString(h,255);

对此：

// this magical 5387 value is the ID of the "Unpin this program from taskbar"
// popup menu caption string in the Shell32.dll string table
LoadString(h,5387,255);

但我不建议那样.没有正式的方法将程序固定到任务栏,因为这是保留供用户决定的.

作为奖励,我为上面的代码编写了以下包装器：

[Code]
#ifdef UNICODE
  #define AW "W"
#else
  #define AW "A"
#endif

const
  // these constants are not defined in Windows
  SHELL32_STRING_ID_PIN_TO_TASKBAR = 5386;
  SHELL32_STRING_ID_PIN_TO_STARTMENU = 5381;
  SHELL32_STRING_ID_UNPIN_FROM_TASKBAR = 5387;
  SHELL32_STRING_ID_UNPIN_FROM_STARTMENU = 5382;

type
  HINSTANCE = THandle;
  HMODULE = HINSTANCE;

  TPinDest = (
    pdTaskbar,pdStartMenu
  );

function LoadLibrary(lpFileName: string): HMODULE;
  external 'LoadLibrary{#AW}@kernel32.dll stdcall';
function FreeLibrary(hModule: HMODULE): BOOL;
  external 'FreeLibrary@kernel32.dll stdcall';
function LoadString(hInstance: HINSTANCE; uID: UINT;
  lpBuffer: string; nBufferMax: Integer): Integer;
  external 'LoadString{#AW}@user32.dll stdcall';

function TryGetVerbName(ID: UINT; out VerbName: string): Boolean;
var
  Buffer: string;
  BufLen: Integer;
  Handle: HMODULE;
begin
  Result := False;

  Handle := LoadLibrary(ExpandConstant('{sys}Shell32.dll'));
  if Handle <> 0 then
  try
    SetLength(Buffer,255);
    BufLen := LoadString(Handle,ID,Buffer,Length(Buffer));

    if BufLen <> 0 then
    begin
      Result := True;
      VerbName := Copy(Buffer,BufLen);
    end;
  finally
    FreeLibrary(Handle);
  end;
end;

function ExecVerb(const FileName,VerbName: string): Boolean;
var
  I: Integer;
  Shell: Variant;
  Folder: Variant;
  FolderItem: Variant;
begin
  Result := False;

  Shell := CreateOleObject('Shell.Application');
  Folder := Shell.NameSpace(ExtractFilePath(FileName));
  FolderItem := Folder.ParseName(ExtractFileName(FileName));

  for I := 1 to FolderItem.Verbs.Count do
  begin
    if FolderItem.Verbs.Item(I).Name = VerbName then
    begin
      FolderItem.Verbs.Item(I).DoIt;
      Result := True;
      Exit;
    end;
  end;  
end;

function PinAppTo(const FileName: string; PinDest: TPinDest): Boolean;
var
  ResStrID: UINT;
  VerbName: string;
begin
  case PinDest of
    pdTaskbar: ResStrID := SHELL32_STRING_ID_PIN_TO_TASKBAR;
    pdStartMenu: ResStrID := SHELL32_STRING_ID_PIN_TO_STARTMENU;
  end;
  Result := TryGetVerbName(ResStrID,VerbName) and ExecVerb(FileName,VerbName);
end;

function UnpinAppFrom(const FileName: string; PinDest: TPinDest): Boolean;
var
  ResStrID: UINT;
  VerbName: string;
begin
  case PinDest of
    pdTaskbar: ResStrID := SHELL32_STRING_ID_UNPIN_FROM_TASKBAR;
    pdStartMenu: ResStrID := SHELL32_STRING_ID_UNPIN_FROM_STARTMENU;
  end;
  Result := TryGetVerbName(ResStrID,VerbName);
end;

它的可能用途,用于固定：

if PinAppTo(ExpandConstant('{sys}calc.exe'),pdTaskbar) then
  MsgBox('Calc has been pinned to the taskbar.',mbInformation,MB_OK);
if PinAppTo(ExpandConstant('{sys}calc.exe'),pdStartMenu) then
  MsgBox('Calc has been pinned to the start menu.',MB_OK);

并取消固定：

if UnpinAppFrom(ExpandConstant('{sys}calc.exe'),pdTaskbar) then
  MsgBox('Calc is not pinned to the taskbar anymore.',MB_OK);
if UnpinAppFrom(ExpandConstant('{sys}calc.exe'),pdStartMenu) then
  MsgBox('Calc is not pinned to the start menu anymore.',MB_OK);