Save embedded resource to the file system

Question

I use this code to load embedded resource (bitmap image)

HRSRC hResInfo = ::FindResource(hInstance, MAKEINTRESOURCE(resourceId), RT_BITMAP);
HGLOBAL hRes = ::LoadResource(hInstance, hResInfo);
LPVOID memRes = ::LockResource(hRes);
DWORD sizeRes = ::SizeofResource(hInstance, hResInfo);

It works fine.

How I can to save it to the file C:\image.bmp?

This code creates only empty file:

HANDLE hFile = ::CreateFile(L"C:\\image.bmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
DWORD dwWritten = 0;
::WriteFile(hFile, memRes, sizeRes, &dwWritten, NULL);
::CloseHandle(hFile);

SOLUTION:
Create new type "BMP" in resources and place image
HRSRC hResInfo = FindResource(hInstance, MAKEINTRESOURCE(resourceId), _T("BMP"));

You could use the CImage class or GDI+ to get a bitmap encoder. The more practical problem is that programs can't write files to the C: root folder without UAC elevation. This is really the kind of job for an installer. — Hans Passant
– Hans Passant, Commented Apr 30, 2012 at 13:56

Deanna · Accepted Answer · 2012-04-30 13:49:15Z

3

CreateFile(), WriteFile(), and CloseHandle().

WriteFile() takes a pointer and a size so can write from the locked resource directly.

answered Apr 30, 2012 at 13:49

Deanna

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