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[C++] Loading resources

Started by ta0soft Mar 29, 2011 at 3:34 PM 2 replies 1.7k views

Original Post

Mar 29, 2011 at 3:34 PM

Hello, my program contains some text files as resources in binary format (RT_RCDATA) and I'm trying to load them at runtime.

From what I understand, LockResource returns a pointer to the first byte of the resource, but how do I read all of the bytes and store them in a string or char array? I can't find any good examples on the net


 HMODULE module = GetModuleHandle(NULL);
 HRSRC resInfo = FindResource(module, MAKEINTRESOURCE(resourceID), RT_RCDATA);
 DWORD resSize = SizeofResource(module, resInfo);
 HGLOBAL resHandle = LoadResource(module, resInfo);
 char *resData = (char*)LockResource(resHandle);
 // ...?

Buckeye

Mar 29, 2011 at 3:44 PM

memcpy? strcpy?

kdmiller3

Mar 29, 2011 at 3:49 PM

LockResource() returns a pointer to the entire resource, not just a single byte, so you can treat it like a struct or array and memcpy it to your buffer. You got its size with SizeofResource() so all you need is a destination buffer of the appropriate size.

ta0soft

Mar 29, 2011 at 5:43 PM

Well, my app is unicode so I think I need to use wcscpy instead of strcopy. It seems to be working but the string isn't encoded correctly. It just returns a bunch of asian characters

here is my full code:


 bool Load_ResourceW(DWORD resourceID)
 {
 HMODULE module = GetModuleHandle(NULL);
 HRSRC resInfo = FindResource(module, MAKEINTRESOURCE(resourceID), RT_RCDATA);
 if (!resInfo) return false;
 
 DWORD resSize = SizeofResource(module, resInfo);
 if (resSize == 0) return false;
 
 HGLOBAL resHandle = LoadResource(module, resInfo);
 wchar_t* resData = (wchar_t*)LockResource(resHandle);
 wchar_t *resData2 = new wchar_t[resSize];
 wcscpy(resData2, resData);
 
 MessageBox(NULL, resData2, NULL, MB_OK);
 return true;
 };

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