Replacing all references to the old variable name
Rename variable to “g_targetDepthSet”
In 1.0 WINDOW_TITLE seems to be a define like WNDCLASS_NAME. However, in 1.1 it is a const char* like in the already existing code. It also has a value of "Lego Island" in 1.0 but a value of "Lego®" in 1.1.