About LPSTR

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About LPSTR

 
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  #1
Jul 14th, 2008
I have seen a lot of type LPSTR(and other like LPCSTR, etc) when coding using MFC.

I just know it is equivalent to char*, but what LPSTR exactly is?
(ie, is it a native type in C++, or a macro in C++, or a typedef in C++, or...)
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Re: About LPSTR

 
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Jul 14th, 2008
It's a typedef.
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Re: About LPSTR

 
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  #3
Jul 14th, 2008
Yes, windows tend to do that for alot of types, and sometimes theres no need for them, for example in one of the header files I found these:
CPP Syntax (Toggle Plain Text) 
  1. #define CONST               const
  2. typedef int                 INT;
  3. typedef float               FLOAT;
and hunderds more..
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Re: About LPSTR

 
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  #4
Jul 14th, 2008
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Originally Posted by williamhemswort View Post
Yes, windows tend to do that for alot of types, and sometimes theres no need for them, for example in one of the header files I found these:
CPP Syntax (Toggle Plain Text) 
  1. #define CONST               const
  2. typedef int                 INT;
  3. typedef float               FLOAT;
and hunderds more..
Hmm I wonder...

c++ Syntax (Toggle Plain Text) 
  1.  
  2. typedef void VOID

=P
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Re: About LPSTR

 
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  #5
Jul 14th, 2008
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Originally Posted by Alex Edwards View Post
Hmm I wonder...

c++ Syntax (Toggle Plain Text) 
  1.  
  2. typedef void VOID

=P
I'm pretty sure that exists too.

I also love this one (not sure if its in Windows API or DirectX):
C++ Syntax (Toggle Plain Text) 
  1. #define 1 TRUE
  2. #define 0 FALSE
  3. typedef int BOOL;

It's just a way to make types sort of case-insensitive. It may be a bit superfluous at times, but it's a neat thing to have.
I'm a student. If my statements seem too absolute, feel free to coat them with "In my opinion..." or "I believe...".
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Re: About LPSTR

 
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Jul 14th, 2008
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Originally Posted by CoolGamer48 View Post
I'm pretty sure that exists too.

I also love this one (not sure if its in Windows API or DirectX):
C++ Syntax (Toggle Plain Text) 
  1. #define 1 TRUE
  2. #define 0 FALSE
Actually it would be

C++ Syntax (Toggle Plain Text) 
  1. #define TRUE 1 
  2. #define FALSE 0
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Re: About LPSTR

 
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  #7
Jul 14th, 2008
the BOOL typedef'd as an int isn't actually so bad, it allows you to set your own returns values like:
CPP Syntax (Toggle Plain Text) 
  1. #define FALSE		0
  2. #define TRUE		1
  3. #define OVERFLOW	2
  4. #define FAIL		3
  5. #define SUCCESS		4
any many more...

and can be more understood when returned as BOOL instead of int.
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Re: About LPSTR

 
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  #8
Jul 14th, 2008
These typedefs and macros were created by MS team in early Windows era in the interests of portability.
See brief summary and historical introduction:
http://en.wikibooks.org/wiki/Windows...and_Data_Types
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Re: About LPSTR

 
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  #9
Jul 14th, 2008
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Originally Posted by mitrmkar View Post
Actually it would be

C++ Syntax (Toggle Plain Text) 
  1. #define TRUE 1 
  2. #define FALSE 0
Oh ya. Got confused with the typedefs.
I'm a student. If my statements seem too absolute, feel free to coat them with "In my opinion..." or "I believe...".
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