Direct X - Orientations

Hi Devshed,

I was wondering if anyone would know what I need to move my viewport orientation up and down. For example, I have this:



This code will change the orientation of the camera in that it rotates left, using 0.02 makes it go right. I already have this:



Which rotates the camera upwards. However, if you rotate the camera left/right, it adds a slight curve to the rotation, until when you reach 90 degrees in either direction it will perform barrel rolls. I need to find a way to neutralise this curve that is created everytime the orientation differs.

Any help would be greatly appreciated.
Thank you!