1.2.9 Internal Data Structures

Windows maintains internal data structures for each window class and window. These structures are not directly accessible to applications but can be examined and modified by using the following functions:

GetClassInfo

GetClassLong

GetClassName

GetClassWord

GetWindowLong

GetWindowWord

SetClassLong

SetClassWord

SetWindowLong

SetWindowWord

Section 1.2.10 describes some ways in which a window class or window can be modified.