Some question about CString,Unicode,and TCHAR *

[Jason .Y]

Hi~I'm planning to make a smiple program to upload file,but I've
traped by a strange problem,here is a chip of my program:
===========================================
LPCTSTR lpszMyFilePath =COptions::StoragePath+_T("\\test\\")+pWData-

cFileName;

LPCTSTR lpszPeerFilePath = pWData->cFileName;

UINT nMyTaskID = 0;

nMyTaskID = WRMCC_RequestUploadFile (/*_T("\\´æ´¢¿¨\\test\
\20080618.dat")*/lpszMyFilePath,lpszPeerFilePath, FTNOTIFY_Callback );

==============
When I was using _T("\\´æ´¢¿¨\\test\\20080618.dat") as LParm,the program
work successfully.but when I use lpszMyFilePath,which i defined myself
above,the server said "File not exist"

P.S.
COptions::StoragePath is a instance of CString

cFileName is a name of TCHAR[ ] array

and the type of upload function is:
UINT WRMCC_RequestUploadFile ( LPCTSTR lpszMyFilePath, LPCTSTR
lpszPeerFilePath=NULL, FUNC_FTNOTIFY_Callback
Proc_FTNOTIFY_Callback=NULL, BOOL bForceRetransmit=FALSE );

 

[Ian Collins]

Jason .Y wrote:

[lots of windows stuff]

Try a windows group, this isn't standard C++.

 

[cooleaf]

LPCTSTR is only a pointer which point to the temp string,
COptions::StoragePath+_T("\\test\\")+pWData-cFileName; will construct
a temp CString ,but after that it will be destroyed, and the pointer
will point to a invalid memory.


by the way, please do not post Chinese charator in your question, here
is a international mailist, so many people can not read in Chinese.

Hi~I'm planning to make a smiple program to upload file,but I've
traped by a strange problem,here is a chip of my program:
===========================================
LPCTSTR lpszMyFilePath =COptions::StoragePath+_T("\\test\\")+pWData-

cFileName;

LPCTSTR lpszPeerFilePath = pWData->cFileName;

UINT nMyTaskID = 0;

nMyTaskID = WRMCC_RequestUploadFile (/*_T("\\´æ´¢¿¨\\test\
\20080618.dat")*/lpszMyFilePath,lpszPeerFilePath, FTNOTIFY_Callback );

==============
When I was using _T("\\´æ´¢¿¨\\test\\20080618.dat") as LParm,the program
work successfully.but when I use lpszMyFilePath,which i defined myself
above,the server said "File not exist"

P.S.
COptions::StoragePath is a instance of CString

cFileName is a name of TCHAR[ ] array

and the type of upload function is:
UINT WRMCC_RequestUploadFile ( LPCTSTR lpszMyFilePath, LPCTSTR
lpszPeerFilePath=NULL, FUNC_FTNOTIFY_Callback
Proc_FTNOTIFY_Callback=NULL, BOOL bForceRetransmit=FALSE );

 

[Jason .Y]

LPCTSTR is only a pointer which point to the temp string,
COptions::StoragePath+_T("\\test\\")+pWData-cFileName; will construct
a temp CString ,but after that it will be destroyed, and the pointer
will point to a invalid memory.

by the way, please do not post Chinese charator in your question, here
is a international mailist, so many people can not read in Chinese.

Hi~I'm planning to make a smiple program to upload file,but I've
traped by a strange problem,here is a chip of my program:
===========================================
LPCTSTR lpszMyFilePath =COptions::StoragePath+_T("\\test\\")+pWData-

LPCTSTR lpszPeerFilePath = pWData->cFileName;

UINT nMyTaskID = 0;

nMyTaskID = WRMCC_RequestUploadFile (/*_T("\\´æ´¢¿¨\\test\
\20080618.dat")*/lpszMyFilePath,lpszPeerFilePath, FTNOTIFY_Callback );

==============
When I was using _T("\\´æ´¢¿¨\\test\\20080618.dat") as LParm,the program
work successfully.but when I use lpszMyFilePath,which i defined myself
above,the server said "File not exist"

P.S.
COptions::StoragePath is a instance of CString

cFileName is a name of TCHAR[ ] array

and the type of upload function is:
UINT WRMCC_RequestUploadFile ( LPCTSTR lpszMyFilePath, LPCTSTR
lpszPeerFilePath=NULL, FUNC_FTNOTIFY_Callback
Proc_FTNOTIFY_Callback=NULL, BOOL bForceRetransmit=FALSE );- Hide quoted text -

- Show quoted text -

I'm sorry for my ruleless post,and thank you very much for your
assistance.