Is it also possible to apply acrylic effect?

[H5820121]

I would be very grateful if you could write, how you can apply for mygui an acrylic effect or other effects, Or you can't just Mica (Alt)?
Thank you!

[1j01]

I was able to get acrylic working by enabling DWMWA_USE_HOSTBACKDROPBRUSH and using DWMSBT_TRANSIENTWINDOW (3) instead of DWMSBT_TABBEDWINDOW (4) for the backdrop type.

#Include "./GuiEnhancerKit.ahk"

; https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
DWMWA_USE_HOSTBACKDROPBRUSH := 16
DWMWA_SYSTEMBACKDROP_TYPE := 38
; https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_systembackdrop_type
DWMSBT_AUTO := 0
DWMSBT_NONE := 1
DWMSBT_MAINWINDOW := 2
DWMSBT_TRANSIENTWINDOW := 3
DWMSBT_TABBEDWINDOW := 4

ShowTestWindow() {
	Win := GuiExt()

	Win.SetFont("cWhite s16", "Segoe UI")
	Win.SetDarkTitle()  ; needed for dark window background apparently, even though there's no title bar
	Win.SetDarkMenu()  ; should be unnecessary in this simple example

	Win.BackColor := 0x000000

	; Sample content
	Win.Add("Text", "x0 y0 w300 h200 Center +0x200", "Hello, world!")

	; Close when pressing Escape
	Win.OnEvent("Escape", (*) => Win.Destroy())
	; Always on top makes it easy to preview the blur effect against different backgrounds.
	Win.Opt("+AlwaysOnTop -SysMenu -Caption -Border +Owner")

	; Seem to have to show the window before enabling the blur effect
	Win.Show("w300 h200")

	; Enables rounded corners.
	; Doesn't seem to hide the border if the window is already shown, but `-Border` takes care of that.
	Win.SetBorderless(6)
	; Set blur-behind accent effect. (Supported starting with Windows 11 Build 22000.)
	if (VerCompare(A_OSVersion, "10.0.22600") >= 0) {
		Win.SetWindowAttribute(DWMWA_USE_HOSTBACKDROPBRUSH, true)  ; required for DWMSBT_TRANSIENTWINDOW
		Win.SetWindowAttribute(DWMWA_SYSTEMBACKDROP_TYPE, DWMSBT_TRANSIENTWINDOW)
	}
}

ShowTestWindow()

Notes:

• I found that I had to call SetBorderless after showing the window, for the blur-behind effects to work. This seems to run counter to the example on the readme, so I don't know if this is correct usage, but it seems to work!
• I'm not sure about the situation if you want a window with a border/caption.
• The effect seems somewhat unreliable, but resizing the window apparently triggers it to update, so maybe triggering a resize event or something could make it reliable. (Setting up the effect before showing the window seems like the proper way to fix this, but I couldn't get it to work that way.)

[H5820121]

@1j01 Wonderful, thank you very much!
How do I change the opacity setting?
Thanks!

[1j01]

@H5820121 I don't know.