FromBase64String
If it is a C# i will do the following code to get my string, what should i do for VC++. Insted of writting into file is there any possibilities to assing to string variable.
byte[] result = Convert.FromBase64String(str);
FileStream objStream = new FileStream ("D:\\SS.txt",FileMode.Open,FileAccess.Read );
BinaryWriter objWriter = new BinaryWriter (objStream);
objWriter.Write (result);

