Hi to all,

I've run into a problem with these two methods recently. After setting a
profile
by calling calling IWMWriter::SetProfile() with the profile obtained from
the Reader (I am encrypting the source streams with DRM without sample
recompression... at least I am trying to) I call SetDRMAttribute for
WMUse_Advanced_DRM and each
WMDRM_LAXXX attributes.
Then I try to call GenerateSigningKeyPair and GenerateKeySeed but they both
return E_FAIL for the first call (to get the keys length).
I followed the instruction, so why is that happening? Does anybody know
where possibly could be an error?

Thanks in advance, Radek