Compiling D through command line

[Bauss]

What arguments would I do to compile a d project through command 
line. Been trying a few things, but can't get it working.

I always get "Error: cannot read file x"

Read around the net and it most says it's an installation error 
and that reinstalling should fix it, but it works when compiling 
through a few IDE's so I assume it's mistake of my own.

Tried like this:
-c c:\testproject\main.d -m32 -ofc:\testd\out.exe

And tried doing -v and it shows the correct information.

Anyone who got an example to achieve it. The documents doesn't 
explain it proper IMO as there is no example on compiling manual.