How to use float and double？

[Tam]

In masm, how to use float and double type(As c++)?
qword ?

fn proc flag:qword
    ret
fn endp

how to call the procedure ?
"invoke fn, 0.1 " can not work。

[MichaelW]

A similar question was answered here:

http://www.masm32.com/board/index.php?topic=3893.0

BTW, "fn" is the name of a MASM32 macro.

[Tam]

MichaelW, thank you!
by the way, can you tell me what is the "BTW"?

[MichaelW]

BTW = by the way

[Tam]

haha, I've said "by the way", but I don't know "BTW".
ha ha!