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how to create resource in dll and use the resource in app?

Posted on 2003-11-10
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Last Modified: 2013-11-20
hi guys:
i am coding a small app,and write a dll (with mfc support) with a lot of text file in it.
i edit thedll.rc with notepad,add all text file in the rc file,such as
10002                   TEXTS   DISCARDABLE     "texts\\10002-first.txt"
in reource.h file,i do nothing.
the resource id is from 10002 to 30002(a huge one :));
my text file is acsii file and not more than 10kb.
in app,i use these code to load resource text:
            hRsrc=FindResource(hInstance,MAKEINTRESOURCE(10002),"TEXTS");
            hGlobal = LoadResource(hInstance, hRsrc);
            LPVOID pdata = LockResource(hGlobal);  
            LPBYTE sData = (LPBYTE)pdata;
            CString strTemp=(CString)(sData);
            FreeResource(hRsrc);
then compiled dll project and app project,all seems ok.
when the app running and load reosurce,sometimes it works fine,but sometimes it loads 2 or more text resources.(it loads 2 or three text files)
why? what's wrong with it?
can anyone tell me?
thank you guys ahead
johns
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Question by:johnsmithz
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1 Comment
 
LVL 3

Accepted Solution

by:
komar earned 150 total points
ID: 9720912
Hi,

Your code seem to be OK. But you are missing a call to SizeofResource() API which will help you determine the size of the resource you are looking for.
Here is what I suggest:

          hRsrc=FindResource(hInstance,MAKEINTRESOURCE(10002),"TEXTS");
          hGlobal = LoadResource(hInstance, hRsrc);

          TCHAR *szData = (TCHAR *)LockResource(h);
          DWORD dwSizeOfResource = SizeofResource(hRes, hr) / sizeof(TCHAR);

          CString strTemp;
          _tcsncpy(strTemp.GetBuffer(dwSizeOfResource), szData, dwSizeOfResource);
          strTemp.ReleaseBuffer(); //Data is now ready in strTemp

          FreeResource(hRsrc);

Thanks,
Khalid Omar.
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