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LPSTR to LPCTSTR

Posted on 1999-01-28
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Last Modified: 2013-12-03
If the parameter of function is LPCTSTR, how can I pass a variable typed LPSTR to it ?

Andrew
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Question by:andrewyu
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5 Comments
 
LVL 31

Accepted Solution

by:
Zoppo earned 0 total points
ID: 1419419
You can call the function as is, because LPSTR is typedef'd as 'char*' and LPCTSTR as 'const char *', which does not need any expilcit type casting. I.E.

CString str = "Hello, world...";
LPSTR search = ",";
CString subStr = str.SpanExcluding( search );// expects LPCTSTR but needs no cast

ZOPPO
0
 
LVL 86

Expert Comment

by:jkr
ID: 1419420
When you don't use UNICODE, simply typecast it. If not, you'll have to convert it into a UNICODE string first:

LPCTSTR ANSI2UNICODE (char*    pszANSI)
{
static TCHAR awc[ MAX_SIZE];

MultiByteToWideChar ( CP_ACP,
0,
pszANSI,
-1,
awc
lstrlen (pszANSI) + 1
);

return ( awc);
}
0
 

Author Comment

by:andrewyu
ID: 1419421
Maybe I rather ask you in more direct way.

Actually, I want to pass a variable typed LPSTR of  hFile to bcp_init ? It seems that it cannot work, so, any problem in it ?

Andrew
0
 
LVL 31

Expert Comment

by:Zoppo
ID: 1419422
Can you specify 'it seems that it cannot work' a bit more detailed?
Do you get compiler or linker errors or does your code crash or hang?
Perhaps you could also add a small code fragment.

ZOPPO
0
 

Author Comment

by:andrewyu
ID: 1419423
I think it cannot see the parameter !

Andrew
0

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