Create EventArgs And Return Value Similar To FormClosing?

This is for a WindowsCE project,

Windows WM6 does not allow you to hook in WndProc easily as this has been hidden, I've built a class that inherits from MesageWindow, which allows me to receive Messages as intended.

What I'm trying to do is create an event that will return a value Boolean bypassing base.WndProc(ref m);

basically saying I've handled the event it does not have to, similar to how the Form_closing event would work e.g e.Cancel will cancel he closing off the form.

I've not finished my WndProc function as of yet but you should get the picture.

Code:
public delegate void WndProcEventHander(object sender, WndProcEventArgs e);
public event WndProcEventHander OnWndProc;
protected override void WndProc(ref Message m)

[Code].....