您好，我正在尝试在 shell 扩展的上下文菜单中获取级联窗口。我在 .dll 扩展名的上下文菜单中添加了两个子菜单，但想制作一个级联子菜单（我喜欢打开第一个菜单，然后单击里面的某个菜单，想要打开下一个子菜单）。
如何从此代码中获取级联子菜单，我在哪里出错了？
// 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;
}
}