What makes you think that I assume MD5 is an enyption/decryption algorythm? What I wand is to encrypt the checksum of some content hashed using MD5 algorythm. I don't want to encrypt raw data using MD5 algorythm.

I have have a buffer with a check sum which I want to encrypt with the private key in a PKCS#12 certificate using the RSA public-key algorithm with a 1024-bit key lengthis used. I have tried using CryptoAPI in the following sequence: 1. CryptAcquireCertificatePrivateKey - returns HCRIPTPROV 2. CryptGetUserKey - using the returned HCRIPTPROV returns HCRYPTKEY 3. CryptEncrypt - saying 'Bad key' when used the returned from 2 HCRYPTKEY. Also I cannot understant where should be the password for the private key passed. :confused: I'll be gratefull if somenone has an idea how to do that

If you are using the MFC Feature Pack you can use the CPngImage class. You can simply Load PNG image from the resource and use it as CBitmap because CPngImage inherits it. Other way is to use the CImage class which is part of ATL but it can load PNG only from file. As far as I remember CImage::LoadFromResource can load only bitmaps. IMHO CPngImage is more convenient when you just need HBITMAP of the PNG and CImage is more convenient when you are going to blit it on some HDC. But if you need to load from resource CPngImage is your class.

Try calling

avcodec_init();
avcodec_register_all();

near av_register_all();

How come my DELL Inspiron B130 detects device when I plug something in the microphone plug and shows a dialog? And also how come my Skype understands when a microphone is plugged in or out ? :confused: