How to save image as 32-bit BMP?

Question

I have an image with alpha channel, I need to save it as 32-bit BMP. However, mspaint doesn't allow saving as 32-bit, only 24-bit. I have Photoshop CS5, but it doesn't have the option to save as 32-bit BMP also.

Any solution?

Answer 1

I got the answer:

Photoshop >> Menu >> File >> Save As >> Choose format BMP in dropdown box >> Save button >> Choose 32-bit format >> OK button

However, photoshop will save the image as XRGB. I case the image has alpha channel (as ARGB), must use another tool:
http://www.qualibyte.com/pixelformer/