Techniques are described herein that are capable of containing an application in an immersive non-windowed environment. For instance, the application may be configured for use in a windowed environment. Containing the application in the immersive non-windowed environment may involve selectively implementing functionality that is associated with the application based at least in part on whether the functionality is applicable to the immersive non-windowed environment. For example, when a request to implement functionality that is not applicable to the immersive non-windowed environment is received, functionality that is applicable to the immersive non-windowed environment may be implemented in lieu of the functionality that is not applicable to the immersive non-windowed environment. In another example, no action may be taken with regard to the request.