LONGPTRptr

LONGPTRptr is a term that refers to a pointer to a pointer, where the underlying data type being pointed to is a `long` integer. In programming, a pointer is a variable that stores the memory address of another variable. A pointer to a pointer, therefore, is a variable that stores the memory address of another pointer. The `long` integer type is a data type that typically stores larger integer values than a standard `int` type, although its exact size can vary depending on the system architecture and compiler.

When dealing with `LONGPTRptr`, it means that you have a variable that holds the memory address of a `long` pointer. This `long` pointer, in turn, holds the memory address of a `long` integer variable. This multi-level indirection can be useful in scenarios where you need to modify a `long` pointer itself through another pointer, such as when passing a pointer to a function and needing that function to be able to change which `long` variable the original pointer points to. For instance, if a function is designed to allocate memory for a `long` integer and update a pointer passed to it, a `LONGPTRptr` would be the appropriate type to pass to that function. Understanding pointer arithmetic and dereferencing is crucial when working with `LONGPTRptr` to correctly access and manipulate the intended `long` integer values.