Little did I know..

[donkey]

Kudos to Jeremy for this little known capability of the macro system...

Code Select Expand

MakeARGB(%a,%r,%g,%b) MACRO
((%b<<BlueShift)|(%g<<GreenShift)|(%r<<RedShift)|(%a<<AlphaShift))
ENDM

You can inline this if you are using constants...

Code Select Expand

mov eax,MakeARGB(0xFF,15,23,65)
invoke SetPixel,[hdc],10,10,MakeARGB(0xFF,15,23,65)

AlphaOpaque = 0xFF
invoke SetPixel,[hdc],10,10,MakeARGB(AlphaOpaque,15,23,65)

Never knew it could do this but it seems to work fine. There are a lot of macros in the Microsoft headers that could benefit from this ! The only limitation is that it has to be the last parameter on the line but that is something that can be worked around and perhaps Jeremy can remove this restriction.