The ornamental design for a window locking apparatus, as shown and described.
FIG. 1 is a top-front-left perspective view of a window locking apparatus showing my new design;
FIG. 2 is a bottom-rear-right perspective view thereof;
FIG. 3 is a top-front-right perspective view thereof;
FIG. 4 is a bottom-rear-left perspective view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a right-side elevational view thereof;
FIG. 8 is a left-side elevational view thereof;
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
The broken line showing of holes in a window locking apparatus is for the purpose of illustrating portions of the article and forms no part of the claimed design. The broken line showing of threaded shafts is for the purpose of illustrating environmental structure and forms no part of the claimed design.