The ornamental design for a projection on a wall of a microwaveoven, as shown and described.
FIG. 1 is a top, end and side perspective view of a projection on a wall of
a microwave oven showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a side elevation view thereof, the opposite side being identical;
and,
FIG. 4 is an end elevation view thereof,the opposite side being identical.
The outline of a flat wall portion from which the projection extends is
shown in broken lines for illustrative purposes only and forms no part of
the claimed design.