i want to convert a file from text format to binary format using VB how can i achieve this

I don't know exactly what you mean.... do you want to convert every letter to it's binary equivalent, so that A would be 1000001 (65 Dec)? If that is the case, you need to understand that your file is going to be like, 8 times bigger than normal. The reason for that, is because every character is about 1 byte. So, the letter A is 1 byte, and the number 1 is 1 byte. The number 0 is 1 byte, and the letter z is 1 byte. The character # is 1 byte, and so is the © and Җ characters. Your text file is already in Binary format.... 1000001 in Binary would actually display the letter A. So, if you want the program to replace each instance of A with 1000001 in the text file.... it's going to be taking up 7 extra bytes to represent the letter A.... because 1 is 1 byte, 0 is 1 byte, and A is 1 byte.

If you are talking about having code in a text file, and wanting to make it an EXE, that's a different story.....

thank you for the reply.i got the solution.thank u

Would you mind sharing, so the rest of the readers could get the same solution?

Or better still, use bytestream to read and convert the file to binary. I often do this when i need to store large files to database. I' m sure one would'n want to grow a thing 8-times bigger unless its money!