不知道有没有人遇到过这个问题

[zhenyu362]

我用AllocConsole在别人的进程中申请了一个Console
我自己用WriteConsole可以往控制台里面写东西
我见过可以重定向控制台到文件，SetStdHandle(STD_OUTPUT_HANDLE,yourHandle) //yourHandle 可以是文件，管道，Socket...

那么能否用fprintf直接往控制台写东西呢？
怎么实现？fprintf需要一个FILE *,而AllocConsole得到的是一个HANDLE

[zhenyu362]

#include <windows.h>

#include <stdio.h>

#include <fcntl.h>

#include <io.h>

#include <iostream>

#include <fstream>

#ifndef _USE_OLD_IOSTREAMS

using namespace std;

#endif

// maximum mumber of lines the output console should have

static const WORD MAX_CONSOLE_LINES = 500;


void RedirectIOToConsole()

{

int hConHandle;

long lStdHandle;

CONSOLE_SCREEN_BUFFER_INFO coninfo;

FILE *fp;

// allocate a console for this app

AllocConsole();

// set the screen buffer to be big enough to let us scroll text

GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE),

&coninfo);

coninfo.dwSize.Y = MAX_CONSOLE_LINES;

SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE),

coninfo.dwSize);

// redirect unbuffered STDOUT to the console

lStdHandle = (long)GetStdHandle(STD_OUTPUT_HANDLE);

hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "w" );

*stdout = *fp;

setvbuf( stdout, NULL, _IONBF, 0 );

// redirect unbuffered STDIN to the console

lStdHandle = (long)GetStdHandle(STD_INPUT_HANDLE);

hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "r" );

*stdin = *fp;

setvbuf( stdin, NULL, _IONBF, 0 );

// redirect unbuffered STDERR to the console

lStdHandle = (long)GetStdHandle(STD_ERROR_HANDLE);

hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);

fp = _fdopen( hConHandle, "w" );

*stderr = *fp;

setvbuf( stderr, NULL, _IONBF, 0 );


// make cout, wcout, cin, wcin, wcerr, cerr, wclog and clog

// point to console as well

ios::sync_with_stdio();

}
fprintf(stdout,"Hello world");
找到这么一个例子，但是测试发现控制台根本不显示"Hello world"

[Lesleychanging]

hao

[ringphone]

mark

[蒋晟]

why not format your string in memory and call WriteConsole?
Reference:
http://support.microsoft.com/support/kb/articles/Q190/3/51.ASP

[HelloIvan2005]

concern

[菜牛]

设置stdout后，直接用printf就行了。

[zhenyu362]

因为别人的程序是调用的fprintf，我想把我的dll插入它的进程，然后把FILE *stream替换成我的Console 输出流FILE *，然后当他调用fprintf的时候数据就直接输出到我的控制台里面了