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#pragma once
//
// Before calling DelayLoad( DL_MODULE), make sure DLOleInitialize() has been called.
// DLOleTerminate() will also unload loaded modules.
//
BOOL DLOleInitialize();void DLOleTerminate();
//
// DelayLoad( DL_MODULE) loads a particular module in a thread-safe manner and
//returns TRUE on current or past success. This is an efficient way to repeatedly ensure
//a module is loaded.
//
//
// DelayUnload() unloads the module, and should not be called until all threads are done with
//the module. If any threads need to use the module after DelayUnload() is completed, DelayLoad()
//should be called again.
//
typedef struct{ LPCSTR szFunctionName; FARPROC * ppfuncAddress;} DL_FUNCTIONMAP;
struct DL_MODULE{ HMODULE _hDllHandle; const LPCSTR _szDllName; const DL_FUNCTIONMAP *const _pFunctionMap; const int _iFunctionMapSize;
DL_MODULE( const LPCSTR szDllName, const DL_FUNCTIONMAP *const pFunctionMap, const int iFunctionMapSize);#if INET_DEBUG
~DL_MODULE();#endif
private: // disabled dummy assignment operator to
// eliminate /W4 compiler warning C4512
DL_MODULE &operator=( DL_MODULE & ) {}};
BOOL DelayLoad( DL_MODULE* pModule);BOOL DelayUnload( DL_MODULE* pModule);
//
// DL(Function) will wrap a call to function pointer g_pfnFunction.
//
#define DL(func) (* g_pfn ## func)
//
// Ole32 module and import information
//
extern DL_MODULE g_moduleOle32;
// DelayLoad( &Ole32Functions) loads the following function pointers:
extern LPVOID (__stdcall *g_pfnCoTaskMemAlloc)(IN SIZE_T cb);extern HRESULT (__stdcall *g_pfnCLSIDFromString)(IN LPOLESTR lpsz, OUT LPCLSID pclsid);extern HRESULT (__stdcall *g_pfnCoCreateInstance)(IN REFCLSID rclsid, IN LPUNKNOWN pUnkOuter, IN DWORD dwClsContext, IN REFIID riid, OUT LPVOID FAR* ppv);extern HRESULT (__stdcall *g_pfnGetHGlobalFromStream)(IStream *pstm,HGLOBAL *phglobal);extern HRESULT (__stdcall *g_pfnCreateStreamOnHGlobal)(HGLOBAL hGlobal,BOOL fDeleteOnRelease,LPSTREAM *ppstm);extern HRESULT (__stdcall *g_pfnCoInitializeEx)(IN LPVOID pvReserved, IN DWORD dwCoInit);extern void (__stdcall *g_pfnCoUninitialize)(void);
//
//
// OleAut32.dll module and import information
//
//
extern DL_MODULE g_moduleOleAut32;
// From DelayLoad( &OleAut32.dll), the following function pointers are loaded:
extern HRESULT (__stdcall *g_pfnRegisterTypeLib)(ITypeLib * ptlib, OLECHAR *szFullPath, OLECHAR *szHelpDir);extern HRESULT (__stdcall *g_pfnLoadTypeLib)(const OLECHAR *szFile, ITypeLib ** pptlib);extern HRESULT (__stdcall *g_pfnUnRegisterTypeLib)(REFGUID libID, WORD wVerMajor, WORD wVerMinor, LCID lcid, SYSKIND syskind);extern HRESULT (__stdcall *g_pfnDispGetParam)(DISPPARAMS * pdispparams, UINT position, VARTYPE vtTarg, VARIANT * pvarResult, UINT * puArgErr);extern void (__stdcall *g_pfnVariantInit)(VARIANTARG * pvarg);extern HRESULT (__stdcall *g_pfnVariantClear)(VARIANTARG * pvarg);extern HRESULT (__stdcall *g_pfnCreateErrorInfo)(ICreateErrorInfo ** pperrinfo);extern HRESULT (__stdcall *g_pfnSetErrorInfo)(ULONG dwReserved, IErrorInfo * perrinfo);extern HRESULT (__stdcall *g_pfnGetErrorInfo)(ULONG dwReserved, IErrorInfo ** pperrinfo);extern BSTR (__stdcall *g_pfnSysAllocString)(const OLECHAR* pch);extern BSTR (__stdcall *g_pfnSysAllocStringLen)(const OLECHAR * pch, UINT ui);extern void (__stdcall *g_pfnSysFreeString)(BSTR bstr);extern HRESULT (__stdcall *g_pfnVariantChangeType)(VARIANTARG * pvargDest, VARIANTARG * pvarSrc, USHORT wFlags, VARTYPE vt);extern HRESULT (__stdcall *g_pfnSafeArrayDestroy)(SAFEARRAY * psa);extern SAFEARRAY* (__stdcall *g_pfnSafeArrayCreateVector)(VARTYPE vt, LONG lLbound, ULONG cElements);extern HRESULT (__stdcall *g_pfnSafeArrayCopy)(SAFEARRAY * psa, SAFEARRAY ** ppsaOut);extern HRESULT (__stdcall *g_pfnSafeArrayUnaccessData)(SAFEARRAY * psa);extern HRESULT (__stdcall *g_pfnSafeArrayGetUBound)(SAFEARRAY * psa, UINT nDim, LONG * plUbound);extern HRESULT (__stdcall *g_pfnSafeArrayGetLBound)(SAFEARRAY * psa, UINT nDim, LONG * plLbound);extern UINT (__stdcall *g_pfnSafeArrayGetDim)(SAFEARRAY * psa);extern HRESULT (__stdcall *g_pfnSafeArrayAccessData)(SAFEARRAY * psa, void HUGEP** ppvData);extern HRESULT (__stdcall *g_pfnSafeArrayDestroyDescriptor)(SAFEARRAY * psa);extern HRESULT (__stdcall *g_pfnSafeArrayCopyData)(SAFEARRAY *psaSource, SAFEARRAY *psaTarget);
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