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classfac.cpp
资源名称：shell.rar　[点击查看]
上传用户：xhy777
上传日期：2007-02-14
资源大小：24088k
文件大小：2k
源码类别：

系统编程

开发平台：

Visual C++

classfac.cpp：源码内容
  2. #include <windows.h>
  3. #include <objbase.h>
  4. #include <shlobj.h>
  6. #include <docobj.h>
  7. #include "shfolder.h"
  9. #include "classfac.h"
  11. extern LONG        g_DllRefCount;
  15. CClassFactory::CClassFactory()
  16. {
  17.     m_ObjRefCount = 1;
  18.     InterlockedIncrement(&g_DllRefCount);
  19. }
  22. CClassFactory::~CClassFactory()
  23. {
  24.     InterlockedDecrement(&g_DllRefCount);
  25. }
  28. STDMETHODIMP
  29. CClassFactory::QueryInterface(
  30.     REFIID riid,
  31.     LPVOID *ppReturn
  32.     )
  33. {
  34.     *ppReturn = NULL;
  36.     if(IsEqualIID(riid, IID_IUnknown))
  37.         *ppReturn = (IUnknown*)(CClassFactory*)this;
  38.     else if(IsEqualIID(riid, IID_IClassFactory))
  39.         *ppReturn = (CClassFactory*)this;
  41. if(*ppReturn == NULL)
  42. return E_NOINTERFACE;
  44.     (*(LPUNKNOWN*)ppReturn)->AddRef();
  45.     return S_OK;
  46. }                                             
  49. STDMETHODIMP_(DWORD)
  50. CClassFactory::AddRef()
  51. {
  52.     return InterlockedIncrement(&m_ObjRefCount);
  53. }
  56. STDMETHODIMP_(DWORD)
  57. CClassFactory::Release()
  58. {
  59. LONG lDecremented = InterlockedDecrement(&m_ObjRefCount);
  60.     
  61.     if(lDecremented == 0)
  62.        delete this;
  64.     return lDecremented;
  65. }
  68. STDMETHODIMP
  69. CClassFactory::CreateInstance(
  70.     LPUNKNOWN pUnknown,
  71.     REFIID riid,
  72.     LPVOID *ppObject
  73.     )
  74. {
  75.     if(pUnknown != NULL)
  76.         return CLASS_E_NOAGGREGATION;
  79.     CShellFolder *pShellFolder = new CShellFolder(NULL, NULL);
  80.     if(NULL == pShellFolder)
  81.         return E_OUTOFMEMORY;
  83.     //
  84.     // get the QueryInterface return for our return value
  85.     //
  87.     HRESULT hResult = pShellFolder->QueryInterface(riid, ppObject);
  89.     //
  90.     // call Release to decrement the ref count
  91.     //
  93.     pShellFolder->Release();
  95.     return hResult;
  96. }
  98. STDMETHODIMP
  99. CClassFactory::LockServer(
  100.     BOOL fLock
  101.     )
  102. {
  103.     return E_NOTIMPL;
  104. }