Windows programming with C

Hungarian notation used for naming variables.
Hungarian notation requires that a variable be prefixed with an abbreviation of its data type.
Example:
putting letter "P" in front of a data type, or "p" in front of variable usually indicates that the variable is a pointer.

The letter LP stands for "long pointer"

Handle
Handle = a unique identifier
A handle is actually a pointer to a pointer to a memory location.
Handles are unsigned integers that Windows uses internally to keep track of objects in memory.

HWND
What is?
data types that keep tracks of the various object that appear on the screen.

How?