How to check the messages produced by `qDebug`, `qWarning`, `qCritical`

How can I check those messages? In the source code, there are numbers of lines with these macro calls, but I cannot find how to get them. Is this something possible on SC IDE?

According to the Qt’s doc on qWarning

If no message handler has been installed, the message is printed to stderr. Under Windows, the message is sent to the debugger. On QNX the message is sent to slogger2.

In my limited newbie’s point of view, I could not find any handler for these logging macros. Thus, I assume the default output should work. In my case, it’s Windows and the “debugger” should have the messages, but I don’t know what this debugger is.