Transparent Bitmaps?

[mace]

I'm a N00b in customizing XP but there is something I don't believe...

In the Unattended XPCD Guide there is a tip how to import customized OEM Information and Logo.

http://unattended.msfn.org/xp/oeminfo.htm

The author says "Its a good idea to keep it transparent so it blends into the colour of the System Properties window!"

I thought there is perhaps some trick to achive this, but I didn't find anything on this board or the net.

So is there a trick or do I have to change the background color of the Bitmap to the light grey of the system?

This wouldn't look very well when the a theme with a different color is used.

greetz,

m4c3

[Aaron]

hmm, you are right, I'm not at all sure if transparency can be applied to bitmaps. What I did was take the colour of the system properties window and set this as the background colour.

It's true that it will look odd when a different theme is used. An alternative is probably to use a border round it so it can be distinguished.

[mace]

Jep, I've done that. Looks ok...

[CuBie]

The transparancy is that Purple colour - can't remember the hex... It dont support alpha blending or anything though - use png for that

Chris.

[Ausmith1]

Actually all Windows does is take the last color in the image palette and sets it to be the Alpha channel.

Just make sure that you use a palletized BMP image (16 or 265 colors). True color images won't work...

[mace]

I know, the code should be 255,0,255 (Magenta).

Up to now I had no success.

But I only tried in 24Bit (was a tip on the net).

[mace]

It works with color-code 255,0,255 and 16 or 256 colors.

Thanks a lot.