Is it possible to reference a custom MSBuild task in a CSPROJ?

This is what I'm trying to do, basically:

(1) Run a custom code generator to generate a CS file
(2) Add the CS file to the CSPROJ
(3) Build the CSPROJ

The code generator has several inputs.  I've created a custom MSBuild task
to encapsulare capturing those inputs and passing them on to the code
generator.

I've figured out how to create a custom Target in my CSPROJ, based on my
custom MSBuild task.  I can run MSBuild from the command line and direct it
to build my custom Target.

What I'm not quite getting is how I can do this from inside the VS.NET
IDE -- that is, how I can build my SLN (or CSPROJ) such that my custom
Target is built first.

I'm feeling like this maybe a dumb question, but I'm stuck nonetheless.

Thanks in advance.

Howard Hoffman