contextmenuhandle的程序清單如下：
unit ContextMenuHandle;
interface
uses Windows,ActiveX,ComObj,ShlObj,Classes;
type
TContextMenu = class(TComObject,IShellExtInit,IContextMenu)
private
FFileName: array[0..MAX_PATH] of Char;
protected
function IShellExtInit.Initialize = SEIInitialize; // Avoid compiler warning
function SEIInitialize(pidlFolder: PItemIDList; lpdobj: IDataObject;
hKeyProgID: HKEY): HResult; stdcall;
function QueryContextMenu(Menu: HMENU; indexMenu, idCmdFirst, idCmdLast,
uFlags: UINT): HResult; stdcall;
function InvokeCommand(var lpici: TCMInvokeCommandInfo): HResult; stdcall;
function GetCommandString(idCmd, uType: UINT; pwReserved: PUINT;
pszName: LPSTR; cchMax: UINT): HResult; stdcall;
end;
const
Class_ContextMenu: TGUID = '{19741013-C829-11D1-8233-0020AF3E97A0}';
{全局唯一標識符(GUID)是一個16字節（128為）的值，它唯一地標識一個接口(interface)}
var
FileList:TStringList;
implementation
uses ComServ, SysUtils, ShellApi, Registry,UnitForm;
function TContextMenu.SEIInitialize(pidlFolder: PItemIDList; lpdobj: IDataObject;
hKeyProgID: HKEY): HResult;
var
StgMedium: TStgMedium;
FormatEtc: TFormatEtc;
FileNumber,i:Integer;
begin
file://如果lpdobj等於Nil，則本調用失敗
if (lpdobj = nil) then begin
Result := E_INVALIDARG;
Exit;
end;
file://首先初始化並清空FileList以添加文件
FileList:=TStringList.Create;
FileList.Clear;
file://初始化剪貼版格式文件
with FormatEtc do begin
cfFormat := CF_HDROP;
ptd := nil;
dwAspect := DVASPECT_CONTENT;
lindex := -1;
tymed := TYMED_HGLOBAL;
end;
Result := lpdobj.GetData(FormatEtc, StgMedium);
if Failed(Result) then Exit;
file://首先查詢用戶選中的文件的個數
FileNumber := DragQueryFile(StgMedium.hGlobal,$FFFFFFFF,nil,0);
file://循環讀取，將所有用戶選中的文件保存到FileList中
for i:=0 to FileNumber-1 do begin
DragQueryFile(StgMedium.hGlobal, i, FFileName, SizeOf(FFileName));
FileList.Add(FFileName);
Result := NOERROR;
end;
ReleaseStgMedium(StgMedium);
end;
function TContextMenu.QueryContextMenu(Menu: HMENU; indexMenu, idCmdFirst,
idCmdLast, uFlags: UINT): HResult;
begin
Result := 0;
if ((uFlags and $0000000F) = CMF_NORMAL) or
((uFlags and CMF_EXPLORE) <> 0) then begin
// 往Context Menu中加入一個菜單項 ,菜單項的標題為察看位圖文件
InsertMenu(Menu, indexMenu, MF_STRING or MF_BYPOSITION, idCmdFirst,
PChar('文件操作'));
// 返回增加菜單項的個數
Result := 1;
end;
end;
function TContextMenu.InvokeCommand(var lpici: TCMInvokeCommandInfo): HResult;
var
frmOP:TForm1;
begin
// 首先確定該過程是被系統而不是被一個程序所調用
if (HiWord(Integer(lpici.lpVerb)) <> 0) then
begin
Result := E_FAIL;
Exit;
end;
// 確定傳遞的參數的有效性
if (LoWord(lpici.lpVerb) <> 0) then begin
Result := E_INVALIDARG;
Exit;
end;
file://建立文件操作窗口
frmOP:=TForm1.Create(nil);
file://將所有的文件列表添加到文件操作窗口的列表中
frmOP.ListBox1.Items := FileList;
Result := NOERROR;
end;
function TContextMenu.GetCommandString(idCmd, uType: UINT; pwReserved: PUINT;
pszName: LPSTR; cchMax: UINT): HRESULT;
begin
if (idCmd = 0) then begin
if (uType = GCS_HELPTEXT) then
{返回該菜單項的幫助信息，此幫助信息將在用戶把鼠標
移動到該菜單項時出現在狀態條上。}
StrCopy(pszName, PChar('點擊該菜單項將執行文件操作'));
Result := NOERROR;
end
else
Result := E_INVALIDARG;
end;
type
TContextMenuFactory = class(TComObjectFactory)
public
procedure UpdateRegistry(Register: Boolean); override;
end;
procedure TContextMenuFactory.UpdateRegistry(Register: Boolean);
var
ClassID: string;
begin
if Register then begin
inherited UpdateRegistry(Register);
ClassID := GUIDToString(Class_ContextMenu);
file://當注冊擴展庫文件時，添加庫到注冊表中
CreateRegKey('*\shellex', '', '');
CreateRegKey('*\shellex\ContextMenuHandlers', '', '');
CreateRegKey('*\shellex\ContextMenuHandlers\FileOpreation', '', ClassID);
file://如果操作系統為Windows NT的話
if (Win32Platform = VER_PLATFORM_WIN32_NT) then
with TRegistry.Create do
try
RootKey := HKEY_LOCAL_MacHINE;
OpenKey('SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions', True);
OpenKey('Approved', True);
WriteString(ClassID, 'Context Menu Shell Extension');
finally
Free;
end;
end
else begin
DeleteRegKey('*\shellex\ContextMenuHandlers\FileOpreation');
inherited UpdateRegistry(Register);
end;
end;
initialization
TContextMenuFactory.Create(ComServer, TContextMenu, Class_ContextMenu,
'', 'Context Menu Shell Extension', ciMultiInstance,tmApartment);
end.
