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- Newsgroups: comp.os.ms-windows.programmer.misc
- From: chris@chrism.demon.co.uk (Chris Marriott)
- Path: sparky!uunet!pipex!demon!chrism.demon.co.uk!chris
- Subject: Re: Data Type problem !!
- Distribution: world
- References: <1993Jan9.085030.11967%gtonwu@Uz.nthu.edu.tw>
- Organization: None
- Reply-To: chris@chrism.demon.co.uk
- X-Mailer: Simple NEWS 1.90 (ka9q DIS 1.19)
- Lines: 52
- Date: Sat, 9 Jan 1993 17:42:02 +0000
- Message-ID: <726601322snz@chrism.demon.co.uk>
- Sender: usenet@demon.co.uk
-
- In article <1993Jan9.085030.11967%gtonwu@Uz.nthu.edu.tw> gtonwu@Uz.nthu.edu.tw writes:
-
- >Hi, there
- >
- > I am confused by type data types of MSC ! I don't know what is the
- > difference among them , since I was simply using int,unsigned,char..
- > while I did programming under MS-DOS before !
- >
- > Would someone kind enough to tell me the distict difference of the
- > following !?
- >
- > WORD , DWORD, LONG, WPARAM, LPARAM , ...
- >
- > and some others I have to know !
- >
-
- Basically, the reason these new types are there is so you can write source
- code which is portable between 16 and 32-bit versions of Windows. Eg, an
- "int" is 16 bits in Windows 3.1, but 32 bits in Windows NT. A "WORD", on the
- other hand, is *always* 16 bits and so is portable.
-
- Basically,
-
- WORD = unsigned int
- DWORD = unsigned long
- LONG = long
-
- but there's really no need to *know* that. Just declare your own variables
- using the appropriate types and you'll be OK. If you really *must* know,
- the new types are all defined in "windows.h".
-
- The best way to make sure you're using all the new types correctly is to
- #define STRICT and then get rid of all the warning messages you'll most
- likely get.
-
- >
- >--
- >+--------------------------------------------------------------------------+
- >| Tony Wu. (: gtonwu@uz.nthu.edu.tw :) National Tsing Hua Univ. CHE 95. |
- >| |
- >| @@# Hey," You can't beat the feeling !". #@@ |
- >
-
- Chris
- --
- --------------------------------------------------------------------------
- | Chris Marriott | chris@chrism.demon.co.uk |
- | Warrington, UK | BIX: cmarriott |
- | (Still awaiting inspiration | CIX: cmarriott |
- | for a witty .sig .... ) | CompuServe: 100113,1140 |
- --------------------------------------------------------------------------
-
-