Winapi - include windows.h in your script.
With some adjustment the following should work in Lite-C.
HRSRC rc = FindResource(g_hInstance, MAKEINTRESOURCE(IDR_XML1), MAKEINTRESOURCE(XML));
HGLOBAL rcData = LoadResource(g_hInstance, rc);
DWORD size = SizeofResource(g_hInstance, rc);
const char* data = static_cast<const char*>(LockResource(rcData));
As a start:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms648042%28v=vs.85%29.aspx