Binary file containing string (or regexp) as step condition?

[Rogier]

I want to build a step only if a file contains certain data.

For non-binary files, I can use a condition like this:

Build only if macro or expression
[vbld_GetFileContents("MyFile.txt")]
Contains
xxx

But this doesn't work for binary files, especially if they contain nul-characters. The expression will only evaluate to the file's contents up to the first \0 byte.

Is there a way to pull this off with binary files?

Bonus question: instead of containing a literal string (like 'xxx' in the above example) is it possible to check for a regular expression match?