Creating Context Menu / 创建上下文菜单项 / VC++, Windows, DLL, ATL, COM

创建上下文菜单项

1、新建一个ATL Project。

2、建议将Project Property中Linker – General - “Register Output” 设为no，C/C++ - “Code Generation” - “Runtime Library” 设为 /MTd。

3、在Solution Explorer中右键Add Class，选择ATL Simple Object。并在弹出的对话框中为该Class命名。

4、添加完成后建议Build一下Project，MIDL compiler将根据 .idl文件生成IIDs and CLSIDs。

5、（可选）在Solution Explorer中右键Add Resource导入图标资源。

6、切换到新增Class的 .h文件中，使其继承接口IShellExtInit和IContextMenu。并在 .cpp文件中，参照MSDN给出实现。

 // MyContextMenu.h : Declaration of the CMyContextMenu

 #pragma once

 #include "resource.h"       // main symbols

 #include "ContextMenuExample_i.h"

 #include <Shlobj.h>

 #if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)

 #error "Single-threaded COM objects are not properly supported on Windows CE platform, such as the Windows Mobile platforms that do not include full DCOM support. Define _CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA to force ATL to support creating single-thread COM object's and allow use of it's single-threaded COM object implementations. The threading model in your rgs file was set to 'Free' as that is the only threading model supported in non DCOM Windows CE platforms."

 #endif

 using namespace ATL;

 // CMyContextMenu

 class ATL_NO_VTABLE CMyContextMenu :

     public CComObjectRootEx<CComSingleThreadModel>,

     public CComCoClass<CMyContextMenu, &CLSID_MyContextMenu>,

     public IDispatchImpl<IMyContextMenu, &IID_IMyContextMenu,

     &LIBID_ContextMenuExampleLib, /*wMajor =*/ , /*wMinor =*/ >,

     public IShellExtInit,

     public IContextMenu

 {

 public:

     CMyContextMenu()

     {

     }

 DECLARE_REGISTRY_RESOURCEID(IDR_MYCONTEXTMENU)

 BEGIN_COM_MAP(CMyContextMenu)

     COM_INTERFACE_ENTRY(IMyContextMenu)

     COM_INTERFACE_ENTRY(IDispatch)

     COM_INTERFACE_ENTRY(IShellExtInit)

     COM_INTERFACE_ENTRY(IContextMenu)

 END_COM_MAP()

     DECLARE_PROTECT_FINAL_CONSTRUCT()

     HRESULT FinalConstruct();

     void FinalRelease();

 public:

     // IShellExtInit Method

     HRESULT STDMETHODCALLTYPE Initialize(

         _In_opt_  PCIDLIST_ABSOLUTE pidlFolder,

         _In_opt_  IDataObject *pdtobj,

         _In_opt_  HKEY hkeyProgID);

     // IContextMenu Method

     HRESULT STDMETHODCALLTYPE QueryContextMenu(

         _In_  HMENU hmenu,

         _In_  UINT indexMenu,

         _In_  UINT idCmdFirst,

         _In_  UINT idCmdLast,

         _In_  UINT uFlags);

     HRESULT STDMETHODCALLTYPE InvokeCommand(

         _In_  CMINVOKECOMMANDINFO *pici);

     HRESULT STDMETHODCALLTYPE GetCommandString(

         _In_  UINT_PTR idCmd,

         _In_  UINT uType,

         _Reserved_  UINT *pReserved,

         _Out_writes_bytes_((uType & GCS_UNICODE) ? (cchMax * sizeof(wchar_t)) : cchMax) _When_(!(uType & (GCS_VALIDATEA | GCS_VALIDATEW)), _Null_terminated_)  CHAR *pszName,

         _In_  UINT cchMax);

 private:

     HBITMAP MenuIcon1;

     HBITMAP MenuIcon2;

     HBITMAP MenuIcon3;

     HBITMAP MenuIcon4;

 };

 OBJECT_ENTRY_AUTO(__uuidof(MyContextMenu), CMyContextMenu)

MyContextMenu.h

 // MyContextMenu.cpp : Implementation of CMyContextMenu

 #include "stdafx.h"

 #include "MyContextMenu.h"

 // CMyContextMenu

 HRESULT CMyContextMenu::FinalConstruct()

 {

     HINSTANCE hInstance = _AtlBaseModule.GetModuleInstance();

     MenuIcon1 = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP1));

     MenuIcon2 = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP2));

     MenuIcon3 = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP3));

     MenuIcon4 = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP4));

     return S_OK;

 }

 void CMyContextMenu::FinalRelease()

 {

     if (MenuIcon1 != NULL)

     {

         DeleteObject(MenuIcon1);

     }

     if (MenuIcon2 != NULL)

     {

         DeleteObject(MenuIcon2);

     }

     if (MenuIcon3 != NULL)

     {

         DeleteObject(MenuIcon3);

     }

     if (MenuIcon4 != NULL)

     {

         DeleteObject(MenuIcon4);

     }

 }

 HRESULT CMyContextMenu::Initialize(

     _In_opt_  PCIDLIST_ABSOLUTE pidlFolder,

     _In_opt_  IDataObject *pdtobj,

     _In_opt_  HKEY hkeyProgID) {

     HRESULT hr;

     UINT    nFileCount;

     FORMATETC fmt =

     {

         CF_HDROP,

         NULL,

         DVASPECT_CONTENT,

         -,

         TYMED_HGLOBAL

     };

     STGMEDIUM sm =

     {

         TYMED_HGLOBAL

     };

     hr = pdtobj->GetData(&fmt, &sm);

     if (FAILED(hr))

     {

         return hr;

     }

     // query quantity of selected files

     nFileCount = DragQueryFile((HDROP)sm.hGlobal, 0xFFFFFFFF, NULL, );

     if (nFileCount == ) // deal with only one file

     {

         // analyze selected file

     }

     else

     {

         hr = E_INVALIDARG;

     }

     ReleaseStgMedium(&sm);

     return hr;

 }

 // IContextMenu Method

 HRESULT CMyContextMenu::QueryContextMenu(

     _In_  HMENU hmenu,

     _In_  UINT indexMenu,

     _In_  UINT idCmdFirst,

     _In_  UINT idCmdLast,

     _In_  UINT uFlags) {

     UINT uCmdID = idCmdFirst;

     LPCWSTR text1 = TEXT("新增层叠菜单项1");

     LPCWSTR text2 = TEXT("新增菜单项2");

     LPCWSTR text3 = TEXT("新增菜单项3");

     LPCWSTR text4 = TEXT("新增菜单项4");

     // do nothing when flag includes CMF_DEFAULTONLY.

     if (uFlags & CMF_DEFAULTONLY)

     {

         return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, );

     }

     InsertMenu(hmenu, indexMenu, MF_SEPARATOR | MF_BYPOSITION, , NULL);

     indexMenu++;

     HMENU hSubMenu = CreateMenu();

     if (hSubMenu)

     {

         InsertMenu(hSubMenu, , MF_STRING | MF_BYPOSITION, uCmdID++, text2);

         SetMenuItemBitmaps(hSubMenu, , MF_BYPOSITION, MenuIcon2, MenuIcon2);

         InsertMenu(hSubMenu, , MF_STRING | MF_BYPOSITION, uCmdID++, text3);

         SetMenuItemBitmaps(hSubMenu, , MF_BYPOSITION, MenuIcon3, MenuIcon3);

         InsertMenu(hSubMenu, , MF_STRING | MF_BYPOSITION, uCmdID++, text4);

         SetMenuItemBitmaps(hSubMenu, , MF_BYPOSITION, MenuIcon4, MenuIcon4);

         // InsertMenu(hSubMenu, 3, MF_SEPARATOR | MF_BYPOSITION, 0, NULL);//插入分隔线

     }

     InsertMenu(hmenu, indexMenu, MF_STRING | MF_POPUP | MF_BYPOSITION, (UINT_PTR)hSubMenu, text1);

     SetMenuItemBitmaps(hmenu, indexMenu, MF_BYPOSITION, MenuIcon1, MenuIcon1);

     indexMenu++;

     InsertMenu(hmenu, indexMenu, MF_SEPARATOR | MF_BYPOSITION, , NULL);

     indexMenu++;

     // inform the explorer how many menu item we have added

     return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, uCmdID - idCmdFirst);

 }

 HRESULT CMyContextMenu::InvokeCommand(

     _In_  CMINVOKECOMMANDINFO *pici) {

     if ( != HIWORD(pici->lpVerb))

         return E_INVALIDARG;

     // get index of added menu item

     switch (LOWORD(pici->lpVerb))

     {

     case :

     {

         // 执行新增菜单项2触发的操作

         STARTUPINFO si = { sizeof(si) };

         PROCESS_INFORMATION pi;

         TCHAR szCommandLine[] = TEXT("notepad");

         BOOL bCreateRet = CreateProcess(NULL, szCommandLine, NULL, NULL, FALSE, , NULL, NULL, &si, &pi);

         break;

     }

     case :

     {

         // 执行新增菜单项3触发的操作

         STARTUPINFO si = { sizeof(si) };

         PROCESS_INFORMATION pi;

         TCHAR szCommandLine[] = TEXT("write");

         BOOL bCreateRet = CreateProcess(NULL, szCommandLine, NULL, NULL, FALSE, , NULL, NULL, &si, &pi);

         break;

     }

     case :

     {

         // 执行新增菜单项4触发的操作

         STARTUPINFO si = { sizeof(si) };

         PROCESS_INFORMATION pi;

         TCHAR szCommandLine[] = TEXT("cmd");

         BOOL bCreateRet = CreateProcess(NULL, szCommandLine, NULL, NULL, FALSE, , NULL, NULL, &si, &pi);

         break;

     }

     default:

     {

         return E_INVALIDARG;

         break;

     }

     }

     return S_OK;

 }

 HRESULT CMyContextMenu::GetCommandString(

     _In_  UINT_PTR idCmd,

     _In_  UINT uType,

     _Reserved_  UINT *pReserved,

     _Out_writes_bytes_((uType & GCS_UNICODE) ? (cchMax * sizeof(wchar_t)) : cchMax) _When_(!(uType & (GCS_VALIDATEA | GCS_VALIDATEW)), _Null_terminated_)  CHAR *pszName,

     _In_  UINT cchMax) {

     USES_CONVERSION;

     LPCTSTR szPrompt;

     // copy help info to cache when explorer ask

     if (uType & GCS_HELPTEXT)

     {

         switch (idCmd)

         {

         case :

             szPrompt = _T("新增菜单项2说明文字");

             break;

         case :

             szPrompt = _T("新增菜单项3说明文字");

             break;

         case :

             szPrompt = _T("新增菜单项4说明文字");

             break;

         default:

             //ATLASSERT(0);           // should never get here

             return E_INVALIDARG;

             break;

         }

         if (uType & GCS_UNICODE)

         {

             lstrcpynW((LPWSTR)pszName, T2CW(szPrompt), cchMax);

         }

         else

         {

             lstrcpynA(pszName, T2CA(szPrompt), cchMax);

         }

         return S_OK;

     }

     return E_INVALIDARG;

 }

7、在 .rgs文件中添加注册表信息，确保各GUID与 .idl文件中的一致。

 HKCR

 {

     NoRemove CLSID

     {

         ForceRemove {9C50C98F-E1FF-41CF-BD54-E9A3BBDDDEF8} = s 'MyContextMenu Class'

         {

             ForceRemove Programmable

             InprocServer32 = s '%MODULE%'

             {

                 val ThreadingModel = s 'Apartment'

             }

             TypeLib = s '{EB1C2F43-315D-4D8F-9A2A-70E67BE888E2}'

             Version = s '1.0'

         }

     }

     NoRemove *

     {

         NoRemove ShellEx

         {

             NoRemove ContextMenuHandlers

             {

                 ForceRemove MyContextMenu = s '{9C50C98F-E1FF-41CF-BD54-E9A3BBDDDEF8}'

             }

         }

     }

 }

8、Build Project 后打开cmd.exe，通过regsvr32命令注册或解注册生成的 .dll文件。

10、查看效果如下图所示。

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本文为本人原创，如需转载请注明出处。

http://www.cnblogs.com/lantingji/p/5857380.html

巴特西

Creating Context Menu / 创建上下文菜单项 / VC++, Windows, DLL, ATL, COM

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