Code for converting grayscale image to RGB image

[srsaravanan]

i need coding for converting block and white image into RGB image

[Plater]

Just save it as a colored bitmap.
Your gray's aren't magically going to turn into colors, so I don't know what else you want

[srsaravanan]

i have a grayscale image, i want color that...

[Plater]

Right. There is no magical way of knowing what colors your Gray pixels should be. I'm really not sure why you would think that?
Create a new image with the same dimensions as the original, tell it to be like a 24bit bitmap or something like that. Then go transforming your grayscale image into colors that you chose.