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;