>I also prefer using of GIFs - the reason is the same.
>But VFP accept "white" color in every image(BMP, GIF, PNG, etc. ) as background and made it transparent. Nevertheless that my transparent color in GIFs is purple or blue or green.
>That's why I was forced to made a small trick. I do not use "standard white"(255,255,255) I use "gray white"(251,251,251)

That's a great idea. I will change the color to do as suggested.

>Is is good to use GIF versus BMP/MSK? this is difficult question.
>I prefer GIFs. Rainer Becker(www.visualextend.com) prefer to use BMP/MSK in update of framework. If you ask 10 different developers - you will receive 10 different answers - what and why they prefer.

Well, I also found that GIF are not being displayed the same as BMP when disabled. It seems the VFP engine makes it more dark in disable mode as it would be in BMP. For some, it also make the image bigger which does not look good at all.