MFC ERROR GetLastError

 1 void CStockServerDlg::ErrorExit(LPTSTR lpszFunction)    //错误函数

 2 {

 3     // Retrieve the system error message for the last-error code

 4 

 5     LPVOID lpMsgBuf;

 6     LPVOID lpDisplayBuf;

 7     DWORD dw = GetLastError(); 

 8     

 9     FormatMessage(

10         FORMAT_MESSAGE_ALLOCATE_BUFFER | 

11         FORMAT_MESSAGE_FROM_SYSTEM |

12         FORMAT_MESSAGE_IGNORE_INSERTS,

13         NULL,

14         dw,

15         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

16         (LPTSTR) &lpMsgBuf,

17         0, NULL );

18 

19     // Display the error message and exit the process

20 

21     lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, 

22         (lstrlen((LPCTSTR)lpMsgBuf)+lstrlen((LPCTSTR)lpszFunction)+40)*sizeof(TCHAR)); 

23     StringCchPrintf((LPTSTR)lpDisplayBuf, 

24         LocalSize(lpDisplayBuf),

25         TEXT("%s failed with error %d: %s"), 

26         lpszFunction, dw, lpMsgBuf); 

27     ::MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK); 

28     LocalFree(lpMsgBuf);

29     LocalFree(lpDisplayBuf);

30     ExitProcess(dw);

31 }

32 

33 //调用它

34         CStockServerDlg* pError =new CStockServerDlg();

35         pError->ErrorExit(TEXT("Create"));

36         delete pError;    //避免其成为"野指针"

37         pError = NULL;