Re: [platform-swt-dev] Using UpdateLayeredWindow from SWT

[Silenio Quarti <Silenio_Quarti@xxxxxxxxxx>]

Make sure the window has the WS_EX_LAYERED
style bit set. See Shell.setAlpha(). 

Silenio

From:	Scott Kovatch <skovatch@xxxxxxxxx>
To:	"platform-swt-dev@xxxxxxxxxxx" <platform-swt-dev@xxxxxxxxxxx>
Date:	09/03/2009 07:45 PM
Subject:	[platform-swt-dev] Using UpdateLayeredWindow from SWT
Sent by:	platform-swt-dev-bounces@xxxxxxxxxxx

---

Hey,

Does anyone on this list have experience using UpdateLayeredWindow  
from within the SWT? I see it's defined in OS.java and in the DLL but  
no matter what I do the call always fails (returns false) and  
GetLastError is always 0. And, nothing updates on the screen.

I'm using this to implement a non-rectangular splash window. I know  
about Snippet219, but that doesn't allow for images of varying alpha,  
particularly at the edges. With the image I am using, I end up with a  
band around the image.

I still need to check with VC to ensure that the Win32 call is  
actually being invoked, but I wanted to check here if there's  
something odd about the generated code  because nothing within the
SWT  
uses it.

-- Scott

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