208 lines
5.3 KiB
C++
208 lines
5.3 KiB
C++
//***************************************************************************
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//
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// MAINDLL.CPP
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//
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// Module: WMI Sample Property Provider
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//
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// Purpose: Contains DLL entry points. Also has code that controls
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// when the DLL can be unloaded by tracking the number of
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// objects and locks as well as routines that support
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// self registration.
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//
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// Copyright (c) 1997-2001 Microsoft Corporation, All Rights Reserved
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//
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//***************************************************************************
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#include <objbase.h>
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#include <initguid.h>
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#include "sample.h"
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HMODULE ghModule;
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// TODO, GuidGen should be used to generate a unique number for any
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// providers that are going to be used for anything more extensive
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// than just testing.
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DEFINE_GUID(CLSID_PropProvider,0xCEDEB622L,0x8C78,0x11CF,0xA5,0xB6,0x00,0xAA,0x00,0x68,0x0C,0x3F);
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//Count number of objects and number of locks.
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long g_cObj=0;
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long g_cLock=0;
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//***************************************************************************
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//
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// LibMain32
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//
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// Purpose: Entry point for DLL.
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//
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// Return: TRUE if OK.
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//
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//***************************************************************************
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BOOL WINAPI LibMain32(HINSTANCE hInstance, ULONG ulReason
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, LPVOID pvReserved)
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{
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if (DLL_PROCESS_ATTACH==ulReason)
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ghModule = hInstance;
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return TRUE;
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}
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//***************************************************************************
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//
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// DllGetClassObject
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//
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// Purpose: Called by Ole when some client wants a class factory. Return
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// one only if it is the sort of class this DLL supports.
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//
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//***************************************************************************
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STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, PPVOID ppv)
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{
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HRESULT hr;
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CProvFactory *pObj;
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if (CLSID_PropProvider!=rclsid)
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return E_FAIL;
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pObj=new CProvFactory();
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if (NULL==pObj)
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return E_OUTOFMEMORY;
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hr=pObj->QueryInterface(riid, ppv);
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if (FAILED(hr))
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delete pObj;
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return hr;
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}
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//***************************************************************************
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//
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// DllCanUnloadNow
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//
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// Purpose: Called periodically by Ole in order to determine if the
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// DLL can be freed.
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//
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// Return: S_OK if there are no objects in use and the class factory
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// isn't locked.
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//
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//***************************************************************************
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STDAPI DllCanUnloadNow(void)
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{
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SCODE sc;
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//It is OK to unload if there are no objects or locks on the
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// class factory.
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sc=( g_cObj < 1 && g_cLock < 1) ? S_OK : S_FALSE;
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return sc;
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}
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//***************************************************************************
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//
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// DllRegisterServer
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//
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// Purpose: Called when it is time to setup the registry settings. This could
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// be done by a setup program, or by using a system utility such
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// as REGSVR32.EXE.
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//
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// Return: NOERROR if registration successful, error otherwise.
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//***************************************************************************
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STDAPI DllRegisterServer(void)
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{
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char szID[128];
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WCHAR wcID[128];
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char szCLSID[128];
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char szModule[MAX_PATH];
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char * pName = "WMI Sample Prop Provider";
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char * pModel = "Both";
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HKEY hKey1, hKey2;
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// Create the path.
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StringFromGUID2(CLSID_PropProvider, wcID, 128);
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wcstombs(szID, wcID, 128);
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lstrcpy(szCLSID, TEXT("Software\\classes\\CLSID\\"));
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lstrcat(szCLSID, szID);
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// Create entries under CLSID
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RegCreateKey(HKEY_LOCAL_MACHINE, szCLSID, &hKey1);
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RegSetValueEx(hKey1, NULL, 0, REG_SZ, (BYTE *)pName, lstrlen(pName)+1);
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RegCreateKey(hKey1,"InprocServer32",&hKey2);
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GetModuleFileName(ghModule, szModule, MAX_PATH);
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RegSetValueEx(hKey2, NULL, 0, REG_SZ, (BYTE *)szModule,
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lstrlen(szModule)+1);
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RegSetValueEx(hKey2, "ThreadingModel", 0, REG_SZ,
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(BYTE *)pModel, lstrlen(pModel)+1);
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RegCloseKey(hKey1);
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RegCloseKey(hKey2);
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return NOERROR;
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}
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//***************************************************************************
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//
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// DllUnregisterServer
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//
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// Purpose: Called when it is time to remove the registry entries.
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//
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// Return: NOERROR if registration successful, error otherwise.
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//***************************************************************************
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STDAPI DllUnregisterServer(void)
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{
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char szID[128];
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WCHAR wcID[128];
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char szCLSID[128];
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HKEY hKey;
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// Create the path using the CLSID
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StringFromGUID2(CLSID_PropProvider, wcID, 128);
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wcstombs(szID, wcID, 128);
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lstrcpy(szCLSID, TEXT("Software\\classes\\CLSID\\"));
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lstrcat(szCLSID, szID);
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// First delete the InProcServer subkey.
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DWORD dwRet = RegOpenKey(HKEY_LOCAL_MACHINE, szCLSID, &hKey);
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if(dwRet == NO_ERROR)
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{
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RegDeleteKey(hKey, "InProcServer32");
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RegCloseKey(hKey);
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}
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dwRet = RegOpenKey(HKEY_LOCAL_MACHINE, "Software\\classes\\CLSID", &hKey);
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if(dwRet == NO_ERROR)
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{
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RegDeleteKey(hKey,szID);
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RegCloseKey(hKey);
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}
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return NOERROR;
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}
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