前面介绍如如何用WinDBG 生成crash dump 《WinDBG 技巧：如何生成Dump 文件(.dump 命令) 》，但是用户机器上通常不安装WinDBG， 而且多数用户也不知道怎么使用WinDBG。 所以最好是自己程序里面能够捕捉exception/crash，并且生成crash dump，然后通过网络传回到自己服务器。

捕捉exception 可以用API 函数 SetUnhandledExceptionFilter 。生成crash dump 可以用DbgHelp.dll 里面的MiniDumpWriteDump 函数。

LPTOP_LEVEL_EXCEPTION_FILTER WINAPI SetUnhandledExceptionFilter( __in LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter );

BOOL WINAPI MiniDumpWriteDump( __in HANDLE hProcess, __in DWORD ProcessId, __in HANDLE hFile, __in MINIDUMP_TYPE DumpType, __in PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam, __in PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam, __in PMINIDUMP_CALLBACK_INFORMATION CallbackParam );

代码示例：

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#include <dbghelp.h>  
#include <shellapi.h>  
#include <shlobj.h>  
 
 
// 自定义的exectpion filter  
LONG WINAPI MyUnhandledExceptionFilter(struct _EXCEPTION_POINTERS *pExceptionPointers)  
{  
 
    SetErrorMode( SEM_NOGPFAULTERRORBOX );  
 
    //收集信息  
     CStringW strBuild;  
    strBuild.Format(L"Build: %s %s", __DATE__, __TIME__);  
    CStringW strError;  
    HMODULE hModule;  
    WCHAR szModuleName[MAX_PATH] = L"";  
    GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (LPCWSTR)pExceptionPointers->ExceptionRecord->ExceptionAddress, &hModule);  
    GetModuleFileName(hModule, szModuleName, ARRAYSIZE(szModuleName));  
    strError.AppenedFormat(L"%s %d , %d ,%d.", szModuleName,pExceptionPointers->ExceptionRecord->ExceptionCode, pExceptionPointers->ExceptionRecord->ExceptionFlags, pExceptionPointers->ExceptionRecord->ExceptionAddress);  
 
    //生成 mini crash dump  
    BOOL bMiniDumpSuccessful;  
    WCHAR szPath[MAX_PATH];   
    WCHAR szFileName[MAX_PATH];   
    WCHAR* szAppName = L"AppName";  
    WCHAR* szVersion = L"v1.0";  
    DWORD dwBufferSize = MAX_PATH;  
    HANDLE hDumpFile;  
    SYSTEMTIME stLocalTime;  
    MINIDUMP_EXCEPTION_INFORMATION ExpParam;  
    GetLocalTime( &stLocalTime );  
    GetTempPath( dwBufferSize, szPath );  
    StringCchPrintf( szFileName, MAX_PATH, L"%s%s", szPath, szAppName );  
    CreateDirectory( szFileName, NULL );  
    StringCchPrintf( szFileName, MAX_PATH, L"%s%s\\%s-%04d%02d%02d-%02d%02d%02d-%ld-%ld.dmp",   
               szPath, szAppName, szVersion,   
               stLocalTime.wYear, stLocalTime.wMonth, stLocalTime.wDay,   
               stLocalTime.wHour, stLocalTime.wMinute, stLocalTime.wSecond,   
               GetCurrentProcessId(), GetCurrentThreadId());  
    hDumpFile = CreateFile(szFileName, GENERIC_READ|GENERIC_WRITE,   
                FILE_SHARE_WRITE|FILE_SHARE_READ, 0, CREATE_ALWAYS, 0, 0);  
 
    MINIDUMP_USER_STREAM UserStream[2];  
    MINIDUMP_USER_STREAM_INFORMATION UserInfo;  
    UserInfo.UserStreamCount = 1;  
    UserInfo.UserStreamArray = UserStream;  
    UserStream[0].Type = CommentStreamW;  
    UserStream[0].BufferSize = strBuild.GetLength()*sizeof(WCHAR);  
    UserStream[0].Buffer = strBuild.GetBuffer();  
    UserStream[1].Type = CommentStreamW;  
    UserStream[1].BufferSize = strError.GetLength()*sizeof(WCHAR);  
    UserStream[1].Buffer = strError.GetBuffer();  
 
    ExpParam.ThreadId = GetCurrentThreadId();  
    ExpParam.ExceptionPointers = pExceptionPointers;  
    ExpParam.ClientPointers = TRUE;  
      
    MINIDUMP_TYPE MiniDumpWithDataSegs = MiniDumpNormal   
            | MiniDumpWithHandleData   
            | MiniDumpWithUnloadedModules   
            | MiniDumpWithIndirectlyReferencedMemory   
            | MiniDumpScanMemory   
            | MiniDumpWithProcessThreadData   
            | MiniDumpWithThreadInfo;  
    bMiniDumpSuccessful = MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(),   
                    hDumpFile, MiniDumpWithDataSegs, &ExpParam, NULL, NULL);  
  // 上传mini dump 到自己服务器（略）  
  ...  
 
  return EXCEPTION_CONTINUE_SEARCH; //或者 EXCEPTION_EXECUTE_HANDLER 关闭程序  
}  
   
int _tmain()  
{  
  // 设置 execption filter  
  SetUnhandledExceptionFilter(MyUnhandledExceptionFilter);  
  ....  
  return 0;  
}