147 lines
3.2 KiB
C++
147 lines
3.2 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1995.
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//
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// File: SDLL.hxx
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//
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// Contents:
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//
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// Classes:
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//
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// Functions:
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//
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// History: 04-23-97 DanpoZ (Danpo Zhang) Created
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//
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//----------------------------------------------------------------------------
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#ifndef SDLL_HXX_
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#define SDLL_HXX_
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//+---------------------------------------------------------------------------
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//
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// Class: CShellDll
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//
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// Purpose: class wrapper for calling API from delay
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// loaded shell32.dll
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//
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// Interface:
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//
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//
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// History: 04-24-97 DanpoZ (Danpo Zhang) Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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class CShellDll
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{
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public:
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#define DELAYSHELLAPI(_fn, _args, _nargs) \
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HINSTANCE _fn _args { \
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HRESULT hres = Init(); \
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HINSTANCE hI = NULL; \
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if (SUCCEEDED(hres)) { \
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hI = _pfn##_fn _nargs; \
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} \
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return hI; } \
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HINSTANCE (STDAPICALLTYPE* _pfn##_fn) _args;
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HRESULT Init();
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CShellDll();
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~CShellDll();
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DELAYSHELLAPI( ShellExecuteA,
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( HWND hwnd,
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LPCSTR lpOperation,
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LPCSTR lpFile,
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LPCSTR lpParameters,
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LPCSTR lpDirectory,
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INT nShowCmd
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),
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( hwnd, lpOperation, lpFile, lpParameters, lpDirectory, nShowCmd )
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)
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private:
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BOOL _fInited;
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HMODULE _hMod;
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};
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//+---------------------------------------------------------------------------
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//
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// Method: CShellDll::CShellDll
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//
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// Synopsis:
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//
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// History: 04-24-97 DanpoZ (Danpo Zhang) Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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inline
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CShellDll::CShellDll()
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{
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_fInited = FALSE;
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_hMod = NULL;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CShellDll::~CShellDll
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//
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// Synopsis:
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//
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// History: 04-24-97 DanpoZ (Danpo Zhang) Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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inline
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CShellDll::~CShellDll()
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{
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if( _fInited)
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FreeLibrary(_hMod);
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}
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//+---------------------------------------------------------------------------
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//
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// Method: CShellDll::Init
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//
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// Synopsis:
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//
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// History: 04-24-97 DanpoZ (Danpo Zhang) Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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inline
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HRESULT CShellDll::Init()
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{
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HRESULT hr = S_OK;
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if( !_fInited )
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{
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_hMod = LoadLibrary("shell32.dll");
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if( !_hMod )
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hr = HRESULT_FROM_WIN32(GetLastError());
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else
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{
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#define CHECKAPI(_fn) \
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*(FARPROC*)&(_pfn##_fn) = GetProcAddress(_hMod, #_fn); \
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if( !(_pfn##_fn)) hr = E_UNEXPECTED;
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CHECKAPI(ShellExecuteA);
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}
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}
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if( hr == S_OK )
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_fInited = TRUE;
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return hr;
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}
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#endif
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