I've just read the thread below, but I still don't get it !!!! RAHHH !!!

The image that works as a mask is in black & white, where white will be replaced by the original background image, am I right ???

Ok this part is easy... but when I do the SrcInvert to the other image, the part that has to remain transparent changes color, sometimes brighter.

The images that I'm trying to merge with the background are ICOs or a BMPs with Magenta where the transparency will take place.

A little help please.... I´ve already read the section of BitBlt of Fox's but didn't find any clue... (Fox, your page is awesome, what happens here is that I've my mind stuck)