I have a working example using the Windows text-to-speech API, but the problem is it freezes when given a large amount of text.
To solve this I want to make the process asynchronous. I've found the SpeechVoiceSpeakFlags::SVSFlagsAsync flag, but how do I get the results of a previously-submitted request?
Here is my code:
char* TextToWavInner( const wchar_t* voiceRequiredAttributes, const wchar_t* voiceOptionalAttributes, long rate, const wchar_t* textToRender, ULONG* pBytesRead )
{
HRESULT hr;
CComPtr<ISpVoice> cpVoice; //Will send data to ISpStream
CComPtr<ISpStream> cpStream; //Will contain IStream
CComPtr<IStream> cpBaseStream; //raw data
ISpObjectToken* cpToken( NULL ); //Will set voice characteristics
GUID guidFormat;
WAVEFORMATEX* pWavFormatEx = nullptr;
hr = cpVoice.CoCreateInstance( CLSID_SpVoice );
if ( FAILED( hr ) )
return NULL;
hr = SpFindBestToken( SPCAT_VOICES, voiceRequiredAttributes, voiceOptionalAttributes, &cpToken );
if ( FAILED( hr ) )
return NULL;
hr = cpVoice->SetVoice( cpToken );
cpToken->Release();
if ( FAILED( hr ) )
return NULL;
cpVoice->SetRate( rate );
hr = cpStream.CoCreateInstance( CLSID_SpStream );
if ( FAILED( hr ) )
return NULL;
hr = CreateStreamOnHGlobal( NULL, true, &cpBaseStream );
if ( FAILED( hr ) )
return NULL;
hr = SpConvertStreamFormatEnum( SPSF_44kHz16BitMono, &guidFormat, &pWavFormatEx );
if ( FAILED( hr ) )
return NULL;
hr = cpStream->SetBaseStream( cpBaseStream, guidFormat, pWavFormatEx );
if ( FAILED( hr ) )
return NULL;
hr = cpVoice->SetOutput( cpStream, false );
if ( FAILED( hr ) )
return NULL;
SpeechVoiceSpeakFlags voiceFlags = ( SpeechVoiceSpeakFlags ) ( SpeechVoiceSpeakFlags::SVSFlagsAsync | SpeechVoiceSpeakFlags::SVSFPurgeBeforeSpeak );
hr = cpVoice->Speak( textToRender, voiceFlags, NULL );
if ( FAILED( hr ) )
return NULL;
LARGE_INTEGER a = { 0 };
hr = cpStream->Seek( a, STREAM_SEEK_SET, NULL );
if ( FAILED( hr ) )
return NULL;
STATSTG stats;
cpStream->Stat( &stats, STATFLAG_NONAME );
ULONG sSize = stats.cbSize.LowPart;
char* pBuffer = new char[ sSize ];
cpStream->Read( pBuffer, sSize, pBytesRead );
return pBuffer;
}
I'm trying to write a context menu handler with c++. I would like the handler to work on all files and all folders, also those in the left pane o the explorer.
I started based on a CodeProject Project that I'm trying to adapt to my needs. I got it from here.
Until now everything seems to work as expected, except for the folders of the Explorer's left pane.
There I get an AccessViolationException. The exception occures between the right click and the display of the context menu.
I removed the code in the different functions until it works again and it seems that the problem is coming from the QueryContextMenu method.
Does someone know what I'm doing wrong?
Here is my current code that works (somewhat obvious because no item is added):
STDMETHODIMP ShellExt::Initialize (LPCITEMIDLIST pidlFolder, LPDATAOBJECT pDataObj, HKEY hProgID )
{
FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stg = { TYMED_HGLOBAL };
HDROP hDrop;
// Look for CF_HDROP data in the data object.
if ( FAILED( pDataObj->GetData ( &fmt, &stg ) ))
{
// Nope! Return an "invalid argument" error back to Explorer.
return E_INVALIDARG;
}
// Get a pointer to the actual data.
hDrop = (HDROP) GlobalLock ( stg.hGlobal );
// Make sure it worked.
if ( NULL == hDrop )
return E_INVALIDARG;
// Sanity check - make sure there is at least one filename.
UINT uNumFiles = DragQueryFile ( hDrop, 0xFFFFFFFF, NULL, 0 );
HRESULT hr = S_OK;
if ( 0 == uNumFiles )
{
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return E_INVALIDARG;
}
// Get the name of the first file and store it in our member variable m_szFile.
if ( 0 == DragQueryFile ( hDrop, 0, m_szFile, MAX_PATH ) )
hr = E_INVALIDARG;
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return hr;
}
STDMETHODIMP ShellExt::QueryContextMenu (HMENU hmenu, UINT uMenuIndex, UINT uidFirstCmd, UINT uidLastCmd, UINT uFlags )
{
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
}
STDMETHODIMP ShellExt::GetCommandString (UINT_PTR idCmd, UINT uFlags, UINT* pwReserved, LPSTR pszName, UINT cchMax)
{
return E_INVALIDARG;
}
STDMETHODIMP ShellExt::InvokeCommand (LPCMINVOKECOMMANDINFO pCmdInfo)
{
return S_OK;
}
But now if I add an item in ShellExt::QueryContextMenu the Explorer's left pane throws the exception, while files and folders in the right pane work great.
I tried the following two version I found on the internet, but both have the same problem:
STDMETHODIMP ShellExt::QueryContextMenu (HMENU hmenu, UINT uMenuIndex, UINT uidFirstCmd, UINT uidLastCmd, UINT uFlags )
{
// If the flags include CMF_DEFAULTONLY then we shouldn't do anything.
if ( uFlags & CMF_DEFAULTONLY )
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
InsertMenu ( hmenu, uMenuIndex, MF_BYPOSITION, uidFirstCmd, _T("Test Item") );
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 1 );
}
and
STDMETHODIMP ShellExt::QueryContextMenu (HMENU hmenu, UINT uMenuIndex, UINT uidFirstCmd, UINT uidLastCmd, UINT uFlags )
{
// If the flags include CMF_DEFAULTONLY then we shouldn't do anything.
if ( uFlags & CMF_DEFAULTONLY )
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
UINT uID = uidFirstCmd;
UINT pos = uMenuIndex;
MENUITEMINFO mii = { sizeof(mii) };
mii.fMask = MIIM_STRING | MIIM_FTYPE | MIIM_ID | MIIM_STATE;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu 1");
mii.fState = MFS_ENABLED;
mii.wID = uID++;
if (!InsertMenuItem(hmenu, pos++, TRUE, &mii))
{
return HRESULT_FROM_WIN32(GetLastError());
}
return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, uID - uidFirstCmd);
}
Parameters I get in QueryContextMenu:
- hmenu = 0x0000000001480405
- uMenuIndex = 3
- uidFirstCmd = 148
- uidLastCmd = 32762
- uFlags = 1044
Exception Details.
The code in QueryContextMenu and GetCommandString gets executed. The exception occures somewhere after this but still before the contextmenu gets visible. Unfortunaly the details do not mean very much to me:
Exception thrown at 0x00007FF9B1C4C613 (shell32.dll) in explorer.exe: 0xC0000005: Access violation reading location 0x00007FF9776D9868. occurred
Stacktrace:
shell32.dll!00007ff9b1c4c613()
ExplorerFrame.dll!00007ff98d24993a()
ExplorerFrame.dll!00007ff98d2c69a4()
ExplorerFrame.dll!00007ff98d24de6c()
ExplorerFrame.dll!00007ff98d251286()
ExplorerFrame.dll!00007ff98d1fbad0()
ExplorerFrame.dll!00007ff98d1ad5b3()
ExplorerFrame.dll!00007ff98d180f2e()
user32.dll!00007ff9b079ca66()
user32.dll!00007ff9b079c34b()
comctl32.dll!00007ff99d78b0da()
comctl32.dll!00007ff99d78b017()
ExplorerFrame.dll!00007ff98d187521()
ExplorerFrame.dll!00007ff98d17d2e0()
comctl32.dll!00007ff99d78b0da()
comctl32.dll!00007ff99d78aef2()
user32.dll!00007ff9b079ca66()
user32.dll!00007ff9b079c34b()
duser.dll!00007ff98106dff5()
atlthunk.dll!00007ff983061208()
user32.dll!00007ff9b079ca66()
user32.dll!00007ff9b079c78c()
user32.dll!00007ff9b07afa83()
ntdll.dll!00007ff9b34833a4()
win32u.dll!00007ff9b0071184()
user32.dll!00007ff9b079bfbe()
user32.dll!00007ff9b079be38()
comctl32.dll!00007ff99d77a099()
comctl32.dll!00007ff99d80b556()
comctl32.dll!00007ff99d7b1302()
user32.dll!00007ff9b079ca66()
user32.dll!00007ff9b079c34b()
comctl32.dll!00007ff99d78b0da()
comctl32.dll!00007ff99d78b017()
ExplorerFrame.dll!00007ff98d1bf33b()
ExplorerFrame.dll!00007ff98d1bf27b()
comctl32.dll!00007ff99d78b0da()
comctl32.dll!00007ff99d78aef2()
user32.dll!00007ff9b079ca66()
user32.dll!00007ff9b079c582()
ExplorerFrame.dll!00007ff98d1748a3()
ExplorerFrame.dll!00007ff98d1747a9()
ExplorerFrame.dll!00007ff98d1746f6()
ExplorerFrame.dll!00007ff98d175a12()
ExplorerFrame.dll!00007ff98d1870c2()
windows.storage.dll!00007ff9af8db38c()
windows.storage.dll!00007ff9af8db045()
windows.storage.dll!00007ff9af8daf25()
SHCore.dll!00007ff9b164c315()
kernel32.dll!00007ff9b06281f4()
ntdll.dll!00007ff9b344a251()
It seems I resolved the problem. I reworked the remaining part of the project, i.e. the implementation of the IClassFactory and also the implementation of the IUnknown interface of the shellextension class, with the objective to understand what these "things" are for in that project.
While doing so I found some Bugs, uninitialized variables, casts to wrong types, etc. I also changed some counters from UINT to LONG so that I can use InterlockedIncrement instead of ++. And after that the problem seems to be gone. I can't say exactly what bug caused the AccessViolationException anymore, but at the end it was not in the QueryContextMenu method as I thought...
I took this code from the web to add a firewall exception for my application:
STDAPI AddApplicationToExceptionListW( const WCHAR* strGameExeFullPath, const WCHAR* strFriendlyAppName )
{
HRESULT hr = E_FAIL;
bool bCleanupCOM = false;
BSTR bstrFriendlyAppName = NULL;
BSTR bstrGameExeFullPath = NULL;
INetFwAuthorizedApplication* pFwApp = NULL;
INetFwAuthorizedApplications* pFwApps = NULL;
INetFwProfile* pFwProfile = NULL;
#ifdef SHOW_DEBUG_MSGBOXES
WCHAR sz[1024];
StringCchPrintf( sz, 1024, L"strFriendlyAppName='%s' strGameExeFullPath='%s'", strFriendlyAppName, strGameExeFullPath );
MessageBox( NULL, sz, L"AddApplicationToExceptionListW", MB_OK );
#endif
if( strGameExeFullPath == NULL || strFriendlyAppName == NULL )
{
assert( false );
return E_INVALIDARG;
}
bstrGameExeFullPath = SysAllocString( strGameExeFullPath );
bstrFriendlyAppName = SysAllocString( strFriendlyAppName );
if( bstrGameExeFullPath == NULL || bstrFriendlyAppName == NULL )
{
hr = E_OUTOFMEMORY;
goto LCleanup;
}
hr = CoInitialize( 0 );
bCleanupCOM = SUCCEEDED( hr );
pFwProfile = GetFirewallProfile();
if( pFwProfile == NULL )
{
hr = E_FAIL;
goto LCleanup;
}
hr = pFwProfile->get_AuthorizedApplications( &pFwApps );
if( FAILED( hr ) )
goto LCleanup;
// Create an instance of an authorized application.
hr = CoCreateInstance( __uuidof( NetFwAuthorizedApplication ), NULL,
CLSCTX_INPROC_SERVER, __uuidof( INetFwAuthorizedApplication ), ( void** )&pFwApp );
if( FAILED( hr ) )
goto LCleanup;
// Set the process image file name.
hr = pFwApp->put_ProcessImageFileName( bstrGameExeFullPath );
if( FAILED( hr ) )
goto LCleanup;
// Set the application friendly name.
hr = pFwApp->put_Name( bstrFriendlyAppName );
if( FAILED( hr ) )
goto LCleanup;
// Add the application to the collection.
hr = pFwApps->Add( pFwApp );
LCleanup:
if( bstrFriendlyAppName ) SysFreeString( bstrFriendlyAppName );
if( bstrGameExeFullPath ) SysFreeString( bstrGameExeFullPath );
if( pFwApp ) pFwApp->Release();
if( pFwApps ) pFwApps->Release();
if( pFwProfile ) pFwProfile->Release();
if( bCleanupCOM ) CoUninitialize();
return hr;
}
Everything works great when I try to send data through the Windows firewall, but incoming connections are still blocked. So I have to disable my firewall to recieve data. I thought, that exception would allow all connections (outgoing and incoming)...
Does somebody know what I should add to this code so I can recieve incoming data?
It is not enough to just add the application by itself. The firewall has no way of discovering which port(s) the application is listening on for inbound connections. You have to tell the firewall which port(s) the application is using. You do that via the INetFwProfile::GloballyOpenPorts collection, eg:
INetFwOpenPorts *pFwPorts = NULL;
INetFwOpenPort *pFWPort = NULL;
...
hr = pFwProfile->get_GloballyOpenPorts( &pFwPorts );
if( FAILED( hr ) )
goto LCleanup;
// Create an instance of an open port.
hr = CoCreateInstance( __uuidof( NetFwOpenPort ), NULL, CLSCTX_INPROC_SERVER, __uuidof( INetFwOpenPort ), ( void** )&pFwPort );
if( FAILED( hr ) )
goto LCleanup;
// Set the port number.
hr = pFWPort->put_Port( ... );
if( FAILED( hr ) )
goto LCleanup;
// Add the port to the collection.
hr = pFwPorts->Add( pFwPort );
...
if( pFwPort ) pFwPort->Release();
if( pFwPorts ) pFwPorts->Release();
In my case the solution was deleting the firewall rules that blocked my application. I don't know where these rules came from, but now it finally works.
Hello i'm trying to get cascade window inside context menu in shell extension. I add two submenus inside context menu of .dll extension, but want to make one cascade submenu (i like to open first menu and after clicking on some menu inside, want to open next submenu).
How to get cascade submenus from this code, where did i make mistake?
// OpenWithCtxMenuExt.cpp : Implementation of COpenWithCtxMenuExt
#include "stdafx.h"
#include "OpenWithExt.h"
#include "OpenWithCtxMenuExt.h"
#pragma comment(lib,"shlwapi")
/////////////////////////////////////////////////////////////////////////////
// COpenWithCtxMenuExt
HRESULT COpenWithCtxMenuExt::Initialize ( LPCITEMIDLIST pidlFolder,
LPDATAOBJECT pDataObj,
HKEY hProgID )
{
FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stg = { TYMED_HGLOBAL };
HDROP hDrop;
// Look for CF_HDROP data in the data object.
if ( FAILED( pDataObj->GetData ( &fmt, &stg )))
{
// Nope! Return an "invalid argument" error back to Explorer.
return E_INVALIDARG;
}
// Get a pointer to the actual data.
hDrop = (HDROP) GlobalLock ( stg.hGlobal );
// Make sure it worked.
if ( NULL == hDrop )
return E_INVALIDARG;
// Sanity check - make sure there is at least one filename.
UINT uNumFiles = DragQueryFile ( hDrop, 0xFFFFFFFF, NULL, 0 );
if ( 0 == uNumFiles )
{
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return E_INVALIDARG;
}
HRESULT hr = S_OK;
// Get the name of the first file and store it in our member variable m_szFile.
if ( 0 == DragQueryFile ( hDrop, 0, m_szSelectedFile, MAX_PATH ))
hr = E_INVALIDARG;
else
{
// Quote the name if it contains spaces (needed so the cmd line is built properly)
PathQuoteSpaces ( m_szSelectedFile );
}
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return hr;
}
HRESULT COpenWithCtxMenuExt::QueryContextMenu ( HMENU hmenu, UINT uMenuIndex,
UINT uidFirstCmd, UINT uidLastCmd,
UINT uFlags )
{
// If the flags include CMF_DEFAULTONLY then we shouldn't do anything.
if ( uFlags & CMF_DEFAULTONLY )
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
// First, create and populate a submenu.
HMENU hSubmenu = CreatePopupMenu();
HMENU hSubmenu1 = CreatePopupMenu();
UINT uID = uidFirstCmd;
InsertMenu ( hSubmenu, 0, MF_BYPOSITION, uID++, _T("&Notepad") );
InsertMenu ( hSubmenu, 1, MF_BYPOSITION, uID++, _T("&Internet Explorer") );
InsertMenu ( hSubmenu, 2, MF_BYPOSITION, uID++, _T("&Mspaint") );
InsertMenu ( hSubmenu, 3, MF_BYPOSITION, uID++, _T("&Pop") );
// provjeriti uID da se ne zbraja
InsertMenu ( hSubmenu1, 0, MF_BYPOSITION, uID++, _T("&Notepad") );
InsertMenu ( hSubmenu1, 1, MF_BYPOSITION, uID++, _T("&Mspaint") );
// Insert the submenu into the ctx menu provided by Explorer.
MENUITEMINFO mii = { sizeof(MENUITEMINFO) };
mii.fMask = MIIM_SUBMENU | /*MIIM_STRING*/ 0x00000040 | MIIM_ID;
mii.wID = uID++;
mii.hSubMenu = hSubmenu;
mii.dwTypeData = _T("C&P Open With");
InsertMenuItem ( hmenu, uMenuIndex, TRUE, &mii );
// Insert the submenu into the ctx menu provided by Explorer.
MENUITEMINFO mii1 = { sizeof(MENUITEMINFO) };
mii1.fMask = MIIM_SUBMENU | /*MIIM_STRING*/ 0x00000040 | MIIM_ID;
mii1.wID = uID++;
mii1.hSubMenu = hSubmenu;
mii1.dwTypeData = _T("C&P pod_folder");
InsertMenuItem ( hmenu, uMenuIndex, TRUE, &mii1 );
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, uID - uidFirstCmd );
}
HRESULT COpenWithCtxMenuExt::GetCommandString ( UINT idCmd, UINT uFlags,
UINT* pwReserved, LPSTR pszName,
UINT cchMax )
{
USES_CONVERSION;
// Check idCmd, it must be 0 or 1 since we have two menu items.
if ( idCmd > 3 )
return E_INVALIDARG;
// If Explorer is asking for a help string, copy our string into the
// supplied buffer.
if ( uFlags & GCS_HELPTEXT )
{
LPCTSTR szNotepadText = _T("Open the selected file in Notepad");
LPCTSTR szIEText = _T("Open the selected file in Internet Explorer");
LPCTSTR szPintText = _T("Open the selected file with Mspaint");
LPCTSTR szPopText = _T("Popout");
LPCTSTR szNotepad1Text = _T("Open the selected file in Notepad");
LPCTSTR szPint1Text = _T("Open the selected file with Mspaint");
//LPCTSTR pszText = (0 == idCmd) ? szNotepadText : szIEText;
LPCTSTR pszText;
if(idCmd == 0){
pszText = szNotepadText;
}
if(idCmd == 1){
pszText = szIEText;
}
if(idCmd == 2){
pszText = szPintText;
}
if(idCmd == 3){
pszText = szPopText;
}
if(idCmd == 4){
pszText = szNotepad1Text;
}
if(idCmd == 5){
pszText = szPint1Text;
}
if ( uFlags & GCS_UNICODE )
{
// We need to cast pszName to a Unicode string, and then use the
// Unicode string copy API.
lstrcpynW ( (LPWSTR) pszName, T2CW(pszText), cchMax );
}
else
{
// Use the ANSI string copy API to return the help string.
lstrcpynA ( pszName, T2CA(pszText), cchMax );
}
return S_OK;
}
return E_INVALIDARG;
}
HRESULT COpenWithCtxMenuExt::InvokeCommand ( LPCMINVOKECOMMANDINFO pCmdInfo )
{
// If lpVerb really points to a string, ignore this function call and bail out.
if ( 0 != HIWORD( pCmdInfo->lpVerb ))
return E_INVALIDARG;
// Get the command index.
switch ( LOWORD( pCmdInfo->lpVerb ))
{
case 0:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("notepad.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 1:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("iexplore.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 2:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("mspaint.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 3:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("mspaint.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 4:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("notepad.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 5:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("mspaint.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
default:
return E_INVALIDARG;
break;
}
}
After some time found solution for making cascade context menu inside of existing context menu ... here is code:
// OpenWithCtxMenuExt.cpp : Implementation of COpenWithCtxMenuExt
#include "stdafx.h"
#include "OpenWithExt.h"
#include "OpenWithCtxMenuExt.h"
#pragma comment(lib,"shlwapi")
/////////////////////////////////////////////////////////////////////////////
// COpenWithCtxMenuExt
HRESULT COpenWithCtxMenuExt::Initialize ( LPCITEMIDLIST pidlFolder,
LPDATAOBJECT pDataObj,
HKEY hProgID )
{
FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stg = { TYMED_HGLOBAL };
HDROP hDrop;
// Look for CF_HDROP data in the data object.
if ( FAILED( pDataObj->GetData ( &fmt, &stg )))
{
// Nope! Return an "invalid argument" error back to Explorer.
return E_INVALIDARG;
}
// Get a pointer to the actual data.
hDrop = (HDROP) GlobalLock ( stg.hGlobal );
// Make sure it worked.
if ( NULL == hDrop )
return E_INVALIDARG;
// Sanity check - make sure there is at least one filename.
UINT uNumFiles = DragQueryFile ( hDrop, 0xFFFFFFFF, NULL, 0 );
if ( 0 == uNumFiles )
{
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return E_INVALIDARG;
}
HRESULT hr = S_OK;
// Get the name of the first file and store it in our member variable m_szFile.
if ( 0 == DragQueryFile ( hDrop, 0, m_szSelectedFile, MAX_PATH ))
hr = E_INVALIDARG;
else
{
// Quote the name if it contains spaces (needed so the cmd line is built properly)
PathQuoteSpaces ( m_szSelectedFile );
}
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return hr;
}
HRESULT COpenWithCtxMenuExt::QueryContextMenu ( HMENU hmenu, UINT uMenuIndex,
UINT uidFirstCmd, UINT uidLastCmd,
UINT uFlags )
{
// If the flags include CMF_DEFAULTONLY then we shouldn't do anything.
if ( uFlags & CMF_DEFAULTONLY )
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
// First, create and populate a submenu.
HMENU hSubmenu = CreatePopupMenu();
HMENU hSub = CreatePopupMenu();
UINT uID = uidFirstCmd;
InsertMenu ( hSubmenu, 0, MF_BYPOSITION, uID++, _T("&Notepad") );
InsertMenu ( hSubmenu, 1, MF_BYPOSITION, uID++, _T("&Internet Explorer") );
InsertMenu ( hSubmenu, 2, MF_BYPOSITION, uID++, _T("&Mspaint") );
InsertMenu ( hSubmenu, 3, MF_BYPOSITION, uID++, _T("&Pop") );
InsertMenu ( hSub, 4, MF_BYPOSITION, uID++, _T("&Case") );
InsertMenu ( hSub, 5, MF_BYPOSITION, uID++, _T("&Case") );
// Insert the submenu into the ctx menu provided by Explorer.
MENUITEMINFO mii = { sizeof(MENUITEMINFO) };
mii.fMask = MIIM_SUBMENU | /*MIIM_STRING*/ 0x00000040 | MIIM_ID;
mii.wID = uID++;
mii.hSubMenu = hSubmenu;
mii.dwTypeData = _T("Open With&x");
InsertMenuItem ( hmenu, uMenuIndex, TRUE, &mii );
mii.hSubMenu = hSub;
mii.dwTypeData = _T("Novi Subm&enu");
InsertMenuItem ( hSubmenu, uMenuIndex, TRUE, &mii );
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, uID - uidFirstCmd );
}
HRESULT COpenWithCtxMenuExt::GetCommandString ( UINT idCmd, UINT uFlags,
UINT* pwReserved, LPSTR pszName,
UINT cchMax )
{
USES_CONVERSION;
// Check idCmd, it must be 0 or 1 since we have two menu items.
if ( idCmd > 4 )
return E_INVALIDARG;
// If Explorer is asking for a help string, copy our string into the
// supplied buffer.
if ( uFlags & GCS_HELPTEXT )
{
LPCTSTR szNotepadText = _T("Open the selected file in Notepad");
LPCTSTR szIEText = _T("Open the selected file in Internet Explorer");
LPCTSTR szPintText = _T("Open the selected file with Mspaint");
LPCTSTR szPopText = _T("Popout");
//LPCTSTR pszText = (0 == idCmd) ? szNotepadText : szIEText;
LPCTSTR pszText;
if(idCmd == 0){
pszText = szNotepadText;
}
if(idCmd == 1){
pszText = szIEText;
}
if(idCmd == 2){
pszText = szPintText;
}
if(idCmd == 3){
pszText = szPopText;
}
if(idCmd == 4){
pszText = szPopText;
}
if ( uFlags & GCS_UNICODE )
{
// We need to cast pszName to a Unicode string, and then use the
// Unicode string copy API.
lstrcpynW ( (LPWSTR) pszName, T2CW(pszText), cchMax );
}
else
{
// Use the ANSI string copy API to return the help string.
lstrcpynA ( pszName, T2CA(pszText), cchMax );
}
return S_OK;
}
return E_INVALIDARG;
}
HRESULT COpenWithCtxMenuExt::InvokeCommand ( LPCMINVOKECOMMANDINFO pCmdInfo )
{
// If lpVerb really points to a string, ignore this function call and bail out.
if ( 0 != HIWORD( pCmdInfo->lpVerb ))
return E_INVALIDARG;
// Get the command index.
switch ( LOWORD( pCmdInfo->lpVerb ))
{
case 0:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("notepad.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 1:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("iexplore.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 2:
{
ShellExecute ( pCmdInfo->hwnd, _T("open"), _T("mspaint.exe"),
m_szSelectedFile, NULL, SW_SHOW );
return S_OK;
}
break;
case 4:
{
MessageBox(0, "New command from sub menu", "Case 4", 0);
return S_OK;
}
break;
case 5:
{
MessageBox(0, "New second command from sub menu", "Case 5", 0);
return S_OK;
}
break;
default:
return E_INVALIDARG;
break;
}
}
I have a c++ shell extension dll. The Initialize method is called twice, if I click on the explorer window left pane tree view folders. But if I click any folders on the explorer window right pane, the Initialize method called once.
The issue is my newly added menu items shows twice in the context menu, if I click on the left pane tree view.
I am wondering, is it a window functionality?
I have commented all my implementation and tested with the below code:
IFACEMETHODIMP CMyContextMenu::QueryContextMenu(HMENU hmenu, UINT /*uIndex*/, UINT cmdFirst, UINT /*uidCmdLast*/, UINT /*uFlags*/ )
{
UINT cmdId = uidCmdFirst;
OutputDebugString(L"QueryContextMenu");
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, cmdId - mdFirst );
}
IFACEMETHODIMP CMyContextMenu::Initialize(LPCITEMIDLIST pidlFolder, LPDATAOBJECT pDO, HKEY /*hkeyProgID*/)
{
OutputDebugString(L"Initialize");
return S_OK;
}
When I click on left pane, the DebugViewr output is:
Initialize
QueryContextMenu
Initialize
QueryContextMenu
NoRemove Directory
{
NoRemove Background
{
NoRemove ShellEx
{
NoRemove ContextMenuHandlers
{
ForceRemove myContext = s '{AE843198-3C5D-4EA6-B74F-7A41FC91D7FF}'
}
}
}
}
NoRemove Directory
{
NoRemove ShellEx
{
NoRemove ContextMenuHandlers
{
ForceRemove myContext = s '{AE843198-3C5D-4EA6-B74F-7A41FC91D7FF}'
}
}
}
The above registry entry is causing this issue in Win 7, If I remove "NoRemove Background", the context menu will be displayed once in tree view. But if I click on folder empty area Initialize method will not be invoked.
I am posting a working example from my real program (an application specific code omitted for clarity). Please try it.
STDMETHODIMP CShlExtExample::Initialize (
LPCITEMIDLIST pidlFolder, LPDATAOBJECT pDataObj, HKEY hProgID )
{
FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stg = { TYMED_HGLOBAL };
HDROP hDrop;
// Look for CF_HDROP data in the data object.
if ( FAILED( pDataObj->GetData ( &fmt, &stg ) ))
{
// Return an "invalid argument" error.
return E_INVALIDARG;
}
// Get a pointer to the actual data.
hDrop = (HDROP) GlobalLock ( stg.hGlobal );
if ( NULL == hDrop )
return E_INVALIDARG;
// Make sure there is at least one file to show menu for.
UINT uNumFiles = DragQueryFile ( hDrop, 0xFFFFFFFF, NULL, 0 );
HRESULT hr = S_OK;
if ( 0 == uNumFiles )
{
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return E_INVALIDARG;
}
// Application specific code.
GlobalUnlock ( stg.hGlobal );
ReleaseStgMedium ( &stg );
return hr;
}
STDMETHODIMP CShlExtExample::QueryContextMenu (
HMENU hmenu, UINT uMenuIndex, UINT uidFirstCmd,
UINT uidLastCmd, UINT uFlags )
{
// If the flags include CMF_DEFAULTONLY then do nothing.
if ( uFlags & CMF_DEFAULTONLY )
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 0 );
InsertMenu ( hmenu, uMenuIndex, MF_BYPOSITION, uidFirstCmd, _T("Test Item") );
return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, 1 );
}