How to move camera with keyboard

Hello. I've been working with Construct 2 and really enjoying it so far. However, I've come to a dilemma in the development of my game. I want the game to not have a player character on screen. So instead of having a character for the camera to follow how do I make it so that I can scroll the camera using the directional keys?

Okay. I've created an invisible sprite to use for camera movement. However there seems to be some considerable lag when changing directions this way. Sometimes I have to press the key multiple times before it will finally go in that directions. Also there is some problems with solid objects, since the objects are solid the camera can get snagged on them, even with the camera not set to solid.

okay. Well I've ironed out those issues. Is setting up an RTS-like control scheme possible with Construct 2? Like multiple units, click to move, group selection, etc?

selecting something would be possible by having a "selected" boolean private variable you set to true if the unit is selected.
you just have to foreach the units and check for these variable set to true and apply your actions.

To group, you could have a 2 dimensional array sized this way :
DIM X = maximum number of groups
DIM Y = maximum number of units per groups

and then you select the units you want to group (that is to say, their "selected" variable get set to true)
and when you use your shortcut to groupe them, you foreach them and store their UID in the arrayat(IDofTheGroup,loopindex)

If you want to recall your selection, you just have to do a
for 0 to DIM Y
    if unit.UID == arrayat(IDofTheGroup,loopindex) -> unit set selected to true

I hope you have some knowledge of c2 else I might be a bit hard to understand... If you don't understand, you don't have enough knowledge yet to make a RTS I guess (:

Also: how does one achieve getting the unit to move to a point clicked? I was trying to work on that last night as I wanted to create simple AI to have a certain unit autonomously seek out another, perform an action on it and then return to what it was doing.