C++ Executing CMD Commands

I'm having a serious problem here. I need to execute a CMD command line via C++ without the console window displaying. Therefore I cannot use system(cmd), since the window will display.

I have tried winExec(cmd, SW_HIDE), but this does not work either. CreateProcess is another one I tried. However, this is for running programs or batch files.

I have ended up trying ShellExecute:

ShellExecute( NULL, "open",
    "cmd.exe",
    "ipconfig > myfile.txt",
    "c:\projects\b",
    SW_SHOWNORMAL
);

Can anyone see anything wrong with the above code? I have used SW_SHOWNORMAL until I know this works.

I really need some help with this. Nothing has come to light, and I have been trying for quite a while. Any advice anyone could give would be great :)