AdvSplash.dll - plug-in that lets you throw 
up a splash screen in NSIS installers with 
fading effects (win2k/xp) and transparency.
At the same time can play wav sound file. 

Usage:

1)
   advsplash::show Delay FadeIn FadeOut KeyColor FileName

Delay - length to show the screen for (in milliseconds)
FadeIn - length to show the fadein scene (in ms) (not included in Delay)
FadeOut - length to show the fadeout scene (in ms) (not included in Delay)
KeyColor - color used for transparency, could be any RGB value 
   (for ex. R=255 G=100 B=16 -> KeyColor=0xFF6410), 
   use KeyColor=-1 if there is no transparent color at your image.
   If transparency color set to -2 and image type is gif,
   plug-in tries to extract transparency color from the file
   header. For gif images transparency on the static background 
   works even if KeyColor=-1.
FileName - splash image filename (with extension). Bmp, gif and jpg
   image types supported.
For example:

     advsplash::show 3000 0 0 -2 "$PLUGINSDIR\catch.gif"
or
     advsplash::show 1000 600 400 0xFF6410 $TEMP\spltmp.bmp

2)
     advsplash::play /NOUNLOAD FileName

FileName - sound filename to play (with extension, wav, mp3 ...).
For example:

     advsplash::play /NOUNLOAD "$PLUGINSDIR\snd.mp3"
  or
     advsplash::play /NOUNLOAD /LOOP "$PLUGINSDIR\snd.wav"

Usage sample 

Compatibility:
Basic - Win95 and later.
Fadein/fadeout - win2k/winxp.

Original code - Justin
Converted to a plugin DLL by Amir Szekely (kichik)
Fading and transparency by Nik Medved (brainsucker)
Gif and jpeg support - Takhir Bedertdinov
