AtlGetCommCtrlVersion 和 AtlGetShellVersion

/////////////////////////////////////////////////////////////////////////////

// General DLL Version Helpers
#pragma warning(push)

#pragma warning(disable : 4191) // 'type cast' : unsafe conversion from 'FARPROC' to 'DLLGETVERSIONPROC'
inline HRESULT AtlGetDllVersion(

 _In_ HINSTANCE hInstDLL,

 _Out_ DLLVERSIONINFO* pDllVersionInfo)

{

 ATLENSURE(pDllVersionInfo != NULL);
 // We must get this function explicitly because some DLLs don't implement it.

 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)::GetProcAddress(hInstDLL, "DllGetVersion");
 if(pfnDllGetVersion == NULL)

 {

  return E_NOTIMPL;

 }
 return (*pfnDllGetVersion)(pDllVersionInfo);

}
#pragma warning(pop)
inline HRESULT AtlGetDllVersion(

 _In_z_ LPCTSTR lpstrDllName,

 _Out_ DLLVERSIONINFO* pDllVersionInfo)

{

 HINSTANCE hInstDLL = ::LoadLibrary(lpstrDllName);

 if(hInstDLL == NULL)

 {

  return AtlHresultFromLastError();

 }

 HRESULT hRet = AtlGetDllVersion(hInstDLL, pDllVersionInfo);

 ::FreeLibrary(hInstDLL);

 return hRet;

}
// Common Control Versions:

//   WinNT 4.0          maj=4 min=00

//   IE 3.x             maj=4 min=70

//   IE 4.0             maj=4 min=71

//   IE 5.0             maj=5 min=80

//   Win2000            maj=5 min=81

inline HRESULT AtlGetCommCtrlVersion(

 _Out_ LPDWORD pdwMajor,

 _Out_ LPDWORD pdwMinor)

{

 ATLENSURE(( pdwMajor != NULL ) && ( pdwMinor != NULL ));
 DLLVERSIONINFO dvi;

 memset(&dvi, 0, sizeof(dvi));

 dvi.cbSize = sizeof(dvi);
 HRESULT hRet = AtlGetDllVersion(_T("comctl32.dll"), &dvi);
 if(SUCCEEDED(hRet))

 {

  *pdwMajor = dvi.dwMajorVersion;

  *pdwMinor = dvi.dwMinorVersion;

 }
 return hRet;

}
// Shell Versions:

//   WinNT 4.0                                      maj=4 min=00

//   IE 3.x, IE 4.0 without Web Integrated Desktop  maj=4 min=00

//   IE 4.0 with Web Integrated Desktop             maj=4 min=71

//   IE 4.01 with Web Integrated Desktop            maj=4 min=72

//   Win2000                                        maj=5 min=00

inline HRESULT AtlGetShellVersion(

 _Out_ LPDWORD pdwMajor,

 _Out_ LPDWORD pdwMinor)

{

 ATLENSURE(( pdwMajor != NULL) && ( pdwMinor != NULL ));
 DLLVERSIONINFO dvi;

 memset(&dvi, 0, sizeof(dvi));

 dvi.cbSize = sizeof(dvi);

 HRESULT hRet = AtlGetDllVersion(_T("shell32.dll"), &dvi);
 if(SUCCEEDED(hRet))

 {

  *pdwMajor = dvi.dwMajorVersion;

  *pdwMinor = dvi.dwMinorVersion;

 }
 return hRet;

}

=================================================================

HRESULT AtlGetDllVersion(HINSTANCE hInstDLL, DLLVERSIONINFO* pDllVersionInfo)

HRESULT AtlGetDllVersion(LPCTSTR lpstrDllName, DLLVERSIONINFO* pDllVersionInfo)

这两个函数到给定的模块中寻找名为 DllGetVersion() 的导出函数，如果找到了，就调用之。如果 DllGetVersion() 调用成功，它把版本信息返回到 DLLVERSIONINFO结构里。

HRESULT AtlGetCommCtrlVersion(LPDWORD pdwMajor, LPDWORD pdwMinor) 返回 comctl32.dll 的主版本和次版本。

HRESULT AtlGetShellVersion(LPDWORD pdwMajor, LPDWORD pdwMinor) 返回 shell32.dll 的主版本和次版本。