Windows API in C/C++

Help, I have no idea how to correctly use the API to create windows and fill them with text and shit.

Give me information, tutorials, etc.

>>61
#include <windows.h>
#include <winuser.h>

main() {
 MessageBox(0,"Hello world!","Hello world!",0);
}

and you forgot to mention that the second one creates a binary several times bigger than the first.