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LPSTR variable type

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oib111
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Posted: Wed Jun 25, 2008 10:06 am Post subject: LPSTR variable type

Ok. LPSTR is an "alias for PSTR" (quoted MSDN). Basically, a pointer to a string, or char*. If it is already a pointer how come you cannot do this:

Code:

LPSTR bla = new LPSTR;

You have to do:

Code:

LPSTR *bla = new LPSTR;

But LPSTR as stated is a char*. If you do this:

Code:

char *bla = new char;

That works. Why doesn't LPSTR work just by doing this:

Code:

LPSTR bla = new LPSTR

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HomerSexual
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Posted: Wed Jun 25, 2008 11:01 am Post subject: Re: LPSTR variable type

oib111 wrote:

Ok. LPSTR is an "alias for PSTR" (quoted MSDN). Basically, a pointer to a string, or char*. If it is already a pointer how come you cannot do this:

Code:

LPSTR bla = new LPSTR;

You have to do:

Code:

LPSTR *bla = new LPSTR;

But LPSTR as stated is a char*. If you do this:

Code:

char *bla = new char;

That works. Why doesn't LPSTR work just by doing this:

Code:

LPSTR bla = new LPSTR

Ok looking at the bottom 2 exambles. char *bla = new char works while LPSTR bla = new LPSTR.

In the first one you are taking a pointer to bla and making it a non pointer char. In the second one you are taking a pointer to a new pointer. See the difference.

So to test this theory on LPSTR go try to compile this

char *bla = new char*;

Also LPSTR != PSTR.

Long Pointer String
Pointer String
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oib111
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Posted: Wed Jun 25, 2008 11:10 am Post subject:

http://msdn.microsoft.com/en-us/library/cc230353.aspx wrote:

The LPSTR type and its alias PSTR specify a pointer to an array of 8-bit characters, which MAY be terminated by a null character.

also...

http://winprog.org/tutorial/start.html wrote:

An LP prefix stands for Long Pointer. In Win32 the Long part is obsolete so don't worry about it.

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lurc
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Posted: Wed Jun 25, 2008 11:32 am Post subject:

Code:

typedef __nullterminated CHAR *NPSTR, *LPSTR, *PSTR;

All the same.
With other types like BYTE:

Code:

typedef BYTE near *PBYTE;
typedef BYTE far *LPBYTE;

Thing is, near and far Have no actual definition, just a word.
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