Multiple Key Press Detection?

Right, after reading a few threads here recently about overriding the ProcessCmdKey to use arrow keys I thought I'd try it and make a Space Invaders like game.

In a nut shell what I want is to be able to shoot and move at the same time. Let me explain a bit further, at the moment I can move fine - by holding down, say the right arrow key, but as soon as I hit the space bar to shoot, while holding down the arrow key, the movement stops. Of course, what I want is to be able to hit the space bar and keep moving.

I have thought of implementing a series of timers started and stopped by the key down and key up events but it sounds like overkill, is there a better way?

Anyway, the code for Protected Override of processcmdkey as it stands is below:

Code:
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean
Select Case keyData
Case Keys.Right

[Code].....