@WINALPHA — Searches for a
matching window, and returns its alpha transparency.
Syntax:
%@WINALPHA[window,flags]
| window | window title, program name, PID, or HWND |
| flags | bitmapped: |
| 1: return alpha value in hexadecimal |
The return value ranges from 0 (completely transparent; invisible)
to 255 (completely opaque). If the window is not using alpha
transparency, the return value is 255. If no matching window
is found, @WINALPHA will return 00.