How to use keyboards function with _getch(), as it

My problem is that I want to do a special thing when my user is pushing tabulation in the terminal. My first code explains that :

char buffer[100];

while (true)
{
    std::cin.getline(buffer, 100); // do IMMEDIATELY something if 'tabulation' was used ?

}

So I asked myself how to check every chars ? I tried with _getch();

while (true)
{
    c = _getch();

    if (c == '\t')
        // do something special
    else
        std::cout << (char)c;
}

But now, I can't use any specials functions keys as arrows, del, suppr, etc... I can't move into what am I typing as I can with getline()

So is there any solutions to do a special interruption in a middle of a getline() ? Or is it possible to use _getch() in a different way ? I also tried to do an other thread (one with getline() and the other with _getch() for checking every ) but I'm not so sure about what I can do with threads.

It could be possible to handle every special function (arrows keys, del, suppr, etc...) 'manually' but I'm looking for another solution.

Assuming you mean the _getch() function from the Microsoft C runtime library:

The _getch and _getwch functions read a single character from the console without echoing the character. None of these functions can be used to read CTRL+C. When reading a function key or an arrow key, each function must be called twice; the first call returns 0 or 0xE0, and the second call returns the actual key code.

So, if _getch() returns either 0 or 0xE0 (224), you'll have to call the function again to see which specific key was pressed.

At least on my machine, these “extended” character codes are as follows (in decimal):