在MFC中使用AE(AO)进行二次开发时，当目标机器上若没有安装AE的Runtime，程序会直接挂掉。

对此，通过在CXXApp的InitInstance()的起始处增加环境的检测代码，来友好地提示用户安装AE的Runtime。

代码如下：

1 BOOL CMap2DApp::InitInstance() 2 { 3     CoInitialize(NULL); 4  5     try 6     { 7         IAoInitializePtr ipAoInitialize(CLSID_AoInitialize); 8         if (ipAoInitialize==NULL) 9         {10             MessageBox(NULL,"请先安装ArcGIS Engine Runtime!","Map 2D",MB_OK|MB_ICONEXCLAMATION);11             CoUninitialize();12             return FALSE;13         }14         esriLicenseStatus licenseStatus;15         HRESULT hr = ipAoInitialize->Initialize(esriLicenseProductCodeEngine,&licenseStatus);16         17         if (licenseStatus!=esriLicenseCheckedOut)18         {19             MessageBox(NULL,"请先安装ArcGIS Engine Runtime!","Map 2D",MB_OK|MB_ICONEXCLAMATION);20             CoUninitialize();21             return FALSE;22         }23     }24     catch (...)25     {26         MessageBox(NULL,"请先安装ArcGIS Engine Runtime!","Map 2D",MB_OK|MB_ICONEXCLAMATION);27         CoUninitialize();28         return FALSE;29     }30 }