Editing Hungarian notation (section)

==Examples==
*<code>bBusy</code> : [[Boolean data type|Boolean]]
*<code>chInitial</code> : [[character (computing)|char]]
*<code>cApples</code> : count of items
*<code>dwLightYears</code> : double [[Word (data type)|word]] (Systems)
*<code>fBusy</code> : [[Boolean data type|flag]] (or [[Floating-point|float]])
*<code>nSize</code> : [[Integer (computer science)|integer]] (Systems) or count (Apps)
*<code>iSize</code> : [[Integer (computer science)|integer]] (Systems) or index (Apps)
*<code>fpPrice</code> : [[floating-point]]
*<code>decPrice</code> : decimal
*<code>db[[Pi]]</code> : [[double precision|double]] (Systems)
*<code>p[[Foo]]</code> : [[pointer (computer programming)|pointer]]
*<code>rgStudents</code> : array, or range
*<code>szLastName</code> : zero-terminated string
*<code>u16Identifier</code> : unsigned 16-bit [[Integer (computer science)|integer]] (Systems)
*<code>u32Identifier</code> : unsigned 32-bit [[Integer (computer science)|integer]] (Systems)
*<code>stTime</code> : clock time structure
*<code>fnFunction</code> : function name

The mnemonics for pointers and [[Array data structure|arrays]], which are not actual data types, are usually followed by the type of the data element itself:

*<code>pszOwner</code> : pointer to zero-terminated string
*<code>rgfpBalances</code> : array of [[floating-point]] values
*<code>aulColors</code> : array of unsigned long (Systems)

While Hungarian notation can be applied to any programming language and environment, it was widely adopted by [[Microsoft]] for use with the C language, in particular for [[Microsoft Windows]], and its use remains largely confined to that area. In particular, use of Hungarian notation was widely [[Technology evangelist|evangelized]] by [[Charles Petzold]]'s ''"Programming Windows"'', the original (and for many readers, the definitive) book on [[Windows API]] programming.  Thus, many commonly seen constructs of Hungarian notation are specific to Windows:

* For programmers who learned Windows programming in C, probably the most memorable examples are the <code>wParam</code> (word-size parameter) and <code>lParam</code> (long-integer parameter) for the [[WindowProc]]() function.
* <code>hwndFoo</code> : handle to a window
* <code>lpszBar</code> : long pointer to a zero-terminated string

The notation is sometimes extended in [[C++]] to include the [[scope (programming)|scope]] of a variable, optionally separated by an underscore.<ref>{{cite web|title=Mozilla Coding Style|url=https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Prefixes|website=Developer.mozilla.org|access-date=17 March 2015|archive-date=2 December 2019|archive-url=https://web.archive.org/web/20191202222313/https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Prefixes|url-status=dead}}</ref><ref>{{cite web|title=Webkit Coding Style Guidelines|url=http://www.webkit.org/coding/coding-style.html#names-data-members|website=Webkit.org|access-date=17 March 2015}}</ref> This extension is often also used without the Hungarian type-specification:

* <code>g_nWheels</code> : member of a global namespace, integer
* <code>m_nWheels</code> : member of a structure/class, integer
* <code>m_wheels</code>, <code>_wheels</code> : member of a structure/class
* <code>s_wheels</code> : static member of a class
* <code>c_wheels</code> : static member of a function