selfreg.c was copied from dlls/msi/tests and load_resource was copied from dlls/setupapi/tests/install.c.
Two of the tests are marked todo because Wine currently doesn't support the UnregisterOCXs command, only RegisterOCXs.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56209
-- v8: advpack: Ignore lines that begin with '@' in (Un)RegisterOCXs sections.