DwmEnableBlurBehindWindow using DllCall

[EvAsion]

Can anyone convert this http://msdn2.microsoft.com/en-us/library/aa969508.aspx into an autoit function?

I haven't used dllcall before, but so far i think DllCall("dwmapi.dll","int","DwmEnableBlurBehindWindow","hwnd",$var,.... is right, but i don't know what follows.

[Siao]

what follows is a "ptr" to a DWM_BLURBEHIND structure, which you need to DllStructCreate beforehand.

[EvAsion]

what follows is a "ptr" to a DWM_BLURBEHIND structure, which you need to DllStructCreate beforehand.

so something on the lines of

$struct = DllStructCreate("ptr")
if @error Then
    MsgBox(0,"","Error in DllStructCreate " & @error);
    exit
endif
DllCall("dwmapi.dll","int","DwmEnableBlurBehindWindow","hwnd",$hWnd,"prt",DllStructGetPtr($struct))

only the struct relates to:

DWORD dwFlags;

BOOL fEnable;

HRGN hRgnBlur;

BOOL fTransitionOnMaximized;

Edited January 7, 2008 by EvAsion

[Siao]

only the struct relates to:

DWORD dwFlags;

BOOL fEnable;

HRGN hRgnBlur;

BOOL fTransitionOnMaximized;

Which means

$struct = DllStructCreate("dword; int; ptr; int")

And of course you'll have to set the elements of the struct with DllStructSetData, using values according to MSDN specs.

[EvAsion]

ok this is what i've done. i'm thinking that some of the values inside the structure are wrong. Also with ptr, is null "-1","0" or "". And i'm not sure, but is fTransitionOnMaximized automatic or something because its not used in the example of this function.

$Struct = DllStructCreate("dword;int;ptr;int")
DllStructSetData($Struct,1,BitAnd("DWM_BB_ENABLE","DWM_BB_BLURREGION"))
DllStructSetData($Struct,2,"1")
DllStructSetData($Struct,3,"")
;DllStructSetData($Struct,4,"")

MsgBox(0,"DllStruct","Struct Size: " & DllStructGetSize($Struct) & @CRLF & _
        "Struct pointer: " & DllStructGetPtr($Struct) & @CRLF & _
        "Data:" & @CRLF & _
        DllStructGetData($Struct,1) & @CRLF & _
        DllStructGetData($Struct,2) & @CRLF & _
        DllStructGetData($Struct,3) & @CRLF & _
        DllStructGetData($Struct,4))
if @error Then
    MsgBox(0,"","Error in DllStructCreate " & @error);
    exit
endif
DllCall("dwmapi.dll","int","DwmEnableBlurBehindWindow","hwnd",$hWnd,"prt",DllStructGetPtr($Struct))

[Siao]

Const $DWM_BB_ENABLE = 0x00000001
Const $DWM_BB_BLURREGION = 0x00000002
Const $DWM_BB_TRANSITIONONMAXIMIZED = 0x00000004

$Struct = DllStructCreate("dword;int;ptr;int")
DllStructSetData($Struct,1,BitOr($DWM_BB_ENABLE,$DWM_BB_TRANSITIONONMAXIMIZED)) ;<- to combine, use BitOr (simply + also works), not BitAnd. And of course, these are not strings you're combining.
DllStructSetData($Struct,2,1)  ;<- not a string, but int.
DllStructSetData($Struct,4,1)
DllCall("dwmapi.dll","int","DwmEnableBlurBehindWindow","hwnd",$hWnd,"ptr",DllStructGetPtr($Struct)) ; <- was a typo "prt"

Null pointer is 0 (int, not string). But since upon creation all struct elements are already initialized as 0, there's no need for DllStructSetData($Struct,3,0).

Edited January 7, 2008 by Siao

[EvAsion]

Wow. well.. it partly works. It makes text, selections and images transparent/blurred, but not the empty space of a gui(wheres theres no controls) which was what i was assuming it would do. It also doesn't blur at the same consistency as window borders and windows media player.

Const $DWM_BB_ENABLE = 0x00000001
Const $DWM_BB_BLURREGION = 0x00000002
Const $DWM_BB_TRANSITIONONMAXIMIZED = 0x00000004


$hWnd = WinGetHandle("Test GUI")
$Struct = DllStructCreate("dword;int;ptr;int")
DllStructSetData($Struct,1,$DWM_BB_ENABLE)
DllStructSetData($Struct,2,"1")
DllStructSetData($Struct,4,"1")
$dll = DllOpen("dwmapi.dll")
DllCall($dll,"int","DwmEnableBlurBehindWindow","hwnd",$hWnd,"ptr",DllStructGetPtr($Struct))
If @error Then
    msgbox(0,"",@error)
EndIf
DllClose($dll)

Edited January 7, 2008 by EvAsion