See the subject.

hi roshanak, this problem is quite common between HP printer's, if thats the case u can get support from HP official site. if that couldn't help u, the only way is storing the graphics in a bitmap and then print the bitmap like this: private void printDocument_printPage(object sender, PrintEventArgs e) { Bitmap bmpPrint = new Bitmap(1000,1000); Graphics g = Graphics.FromImage(bmpPrint); /* Draw what u need using "g". */ e.Graphics.drawImage(bmpPrint); } the quality is not as good as is should be, unless u change the printing resolution.

Please check this link. http://www.obviex.com/samples/Code.aspx?Source=EncryptionCS&Title=Symmetric%20Key%20Encryption&Lang=C%23[^]

Try googling registration-activation and similar terms. Try looking on codeproject for registration-activation. There is no fool-proof method - if there was M$ would use it already. Decide on a method that is good enough for your needs. Simple approach is for the user to provide certain details and you give back a hash code based on the details. If the activation details and hashed code do not match the software say no! Panic, Chaos, Destruction. My work here is done.

I think the problem is the way you are reading data out of the memory stream. Use a stream reader instead of getting the bytes and doing unicode encoding. I suspect that is screwing things up. Then use a stream writer to put the string back into the memory stream when decrypting. (This works fine on my PC if I make that change) Roshanakak wrote: i don't know how else i can flush them!!! You're not calling dispose no any of your streams. You should be using 'using' to properly dispose of the streams. Anything that has a dispose method should be created within a using block (or if not, make sure you call Dispose() in some other way - like in a finally block) Like this: using (MemoryStream memStream = new MemoryStream()) { using (ICryptoTransform EncryptorDecryptor = Algorithm.CreateEncryptor(key, iv)) { using (CryptoStream crStream = new CryptoStream(memStream, EncryptorDecryptor, CryptoStreamMode.Write)) { using (StreamWriter strWriter = new StreamWriter(crStream)) { strWriter.Write(s); strWriter.Flush(); crStream.FlushFinalBlock(); } } } } Also, you're using a bunch of member variables on the class that your just overwriting when you decrypt. Get rid of these and make them local variables in the method. That will prevent any crossover or leak of setup from one method to the other. Simon