新手求助，如下代码什么意思？

[pooicpen23]

void ClearConsole(HANDLE hConsole)
{
CONSOLE_SCREEN_BUFFER_INFO csbiConsoleInfo;
GetConsoleScreenBufferInfo(hConsole, &csbiConsoleInfo);
SMALL_RECT srcWindow = csbiConsoleInfo.srWindow;
DWORD dNumChars = (srcWindow.Right - srcWindow.Left + 1)*(srcWindow.Bottom - srcWindow.Top + 1);
COORD cStart;
cStart.X = srcWindow.Left;
cStart.Y = srcWindow.Top;
FillConsoleOutputCharacter(hConsole, ' ', dNumChars, cStart, &dNumChars);
}

[幻夢之葉]

http://blog.csdn.net/stude/article/details/7645056 对控制台窗口的一些操作 取得控制台信息，然后取得窗口大小 然后在窗口中填充一些字符 具体含义我并不清楚 只是看到代码的命名来大概推测的含义