vs下调试程序时，把信息打印到输出窗口

转载：https://blog.csdn.net/cwj066/article/details/82423627

　　 https://stackoverflow.com/questions/20508086/getting-rid-of-atltracegeneral-category-shown-in-atltrace-output

方法一：写一个变参函数，把想要打印到输出窗口的信息传给函数，函数内部调用系统函数OutputDebugString()，就可以把调试信息打印到输出窗口。

void OutputDebugPrintf(const char* strOutputString,...)
{
char strBuffer[4096] = {0};

   va_list vlArgs;
   va_start(vlArgs, strOutputString);
   _vsnprintf_s(strBuffer, sizeof(strBuffer) - 1, strOutputString, vlArgs);

   va_end(vlArgs);
   OutputDebugString(CA2W(strBuffer));
}

方法二：调用系统自带的库函数TRACE()，这个函数其实和printf()类似，只不过printf()这个是把信息输出到控制台窗口，而TRACE()这个函数是把信息输出到vs2010的输出窗口，方便编程人员调试用。

TRACE(“%s”, "no error, no warning");

TRACE(“%d”, 1024);

TRACE(“%d”, 520.1314);

TRACE(“%c”, 'U');

头文件：

#include<afx.h>

未验证方法1

其它：不想要这个信息

采用下面的方法，显示的信息变成：

问题：

After upgrading to VS2013 I started receiving all my ATLTRACE2 messages in a "() : atlTraceGeneral - My output" format.

e.g.

ATLTRACE(_T("This is my data: %d
"), 124);

... shown as

dllmain.cpp(1121) : atlTraceGeneral - This is my data: 124

I don't need any additional info. Is here some way to get back to the previous format so that the output would be just

This is my data: 124

回答：

The only working fix is to undef ATLTRACE under _DEBUG macro and implement trace by yourself. Guys at Microsoft recommended the same.

The solution looks like this:

1 #ifdef _DEBUG
2 #ifdef ATLTRACE 
3 #undef ATLTRACE
4 #undef ATLTRACE2
5 
6 #define ATLTRACE CustomTrace
7 #define ATLTRACE2 ATLTRACE
8 #endif // ATLTRACE
9 #endif // _DEBUG

with the following CustomTraces:

void CustomTrace(const wchar_t* format, ...)
{
    const int TraceBufferSize = 1024;
    wchar_t buffer[TraceBufferSize];

    va_list argptr; va_start(argptr, format);
    vswprintf_s(buffer, format, argptr);
    va_end(argptr);

    ::OutputDebugString(buffer);
}

void CustomTrace(int dwCategory, int line, const wchar_t* format, ...)
{
    va_list argptr; va_start(argptr, format);
    CustomTrace(format, argptr);
    va_end(argptr);
}