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。

 

 1 // MyContextMenu.h : Declaration of the CMyContextMenu
 2 
 3 #pragma once
 4 #include "resource.h"       // main symbols
 5 
 6 
 7 
 8 #include "ContextMenuExample_i.h"
 9 #include <Shlobj.h>
10 
11 
12 
13 #if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)
14 #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."
15 #endif
16 
17 using namespace ATL;
18 
19 
20 // CMyContextMenu
21 
22 class ATL_NO_VTABLE CMyContextMenu :
23     public CComObjectRootEx<CComSingleThreadModel>,
24     public CComCoClass<CMyContextMenu, &CLSID_MyContextMenu>,
25     public IDispatchImpl<IMyContextMenu, &IID_IMyContextMenu, 
26     &LIBID_ContextMenuExampleLib, /*wMajor =*/ 1, /*wMinor =*/ 0>,
27     public IShellExtInit,
28     public IContextMenu
29 {
30 public:
31     CMyContextMenu()
32     {
33     }
34 
35 DECLARE_REGISTRY_RESOURCEID(IDR_MYCONTEXTMENU)
36 
37 
38 BEGIN_COM_MAP(CMyContextMenu)
39     COM_INTERFACE_ENTRY(IMyContextMenu)
40     COM_INTERFACE_ENTRY(IDispatch)
41     COM_INTERFACE_ENTRY(IShellExtInit)
42     COM_INTERFACE_ENTRY(IContextMenu)
43 END_COM_MAP()
44 
45 
46 
47     DECLARE_PROTECT_FINAL_CONSTRUCT()
48 
49     HRESULT FinalConstruct();
50 
51     void FinalRelease();
52 
53 public:
54     // IShellExtInit Method
55     HRESULT STDMETHODCALLTYPE Initialize(
56         _In_opt_  PCIDLIST_ABSOLUTE pidlFolder,
57         _In_opt_  IDataObject *pdtobj,
58         _In_opt_  HKEY hkeyProgID);
59 
60     // IContextMenu Method
61     HRESULT STDMETHODCALLTYPE QueryContextMenu(
62         _In_  HMENU hmenu,    
63         _In_  UINT indexMenu,    
64         _In_  UINT idCmdFirst,
65         _In_  UINT idCmdLast,
66         _In_  UINT uFlags);
67 
68     HRESULT STDMETHODCALLTYPE InvokeCommand(
69         _In_  CMINVOKECOMMANDINFO *pici);
70 
71     HRESULT STDMETHODCALLTYPE GetCommandString(
72         _In_  UINT_PTR idCmd,
73         _In_  UINT uType,
74         _Reserved_  UINT *pReserved,
75         _Out_writes_bytes_((uType & GCS_UNICODE) ? (cchMax * sizeof(wchar_t)) : cchMax) _When_(!(uType & (GCS_VALIDATEA | GCS_VALIDATEW)), _Null_terminated_)  CHAR *pszName,
76         _In_  UINT cchMax);
77 
78 private:
79     HBITMAP MenuIcon1;
80     HBITMAP MenuIcon2;
81     HBITMAP MenuIcon3;
82     HBITMAP MenuIcon4;
83 
84 
85 };
86 
87 OBJECT_ENTRY_AUTO(__uuidof(MyContextMenu), CMyContextMenu)

MyContextMenu.h