Flashing window does not work for TabbedThumbnail (taskbar preview)
For my application, I am using FlashWindowEx (ref FLASHWINFO pwfi) from the user32.dll file to launch the taskbar and my attention window.
I am currently trying to add a custom window preview image to the taskbar, the best way I found this using the TaskbarManager in WindowsAPICodePack.
This works well, but when I call the method to start the window, the taskbar blinks, but the window that is presented with TabbedThumbnail is not.
A sample program that uses this is Skype for Business (formerly Lync). To better understand what is going on and what I would like to have, I have added an image and a demo project.
image problem:
Is there a way to combine both of these features, like skype for business?
S4b image:
Source for the demo project: http://project14.net/Dev/csharp/FlashingCustomTaskbarItem.zip
Thank you for your time!
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I found the answer myself. I downloaded WindowsAPICodePack and expanded GlassWindow. It took a while to get things right in WPF.
Here's an example for winForms: http://www.codeproject.com/Articles/45567/Creating-a-Timer-Using-the-Amazing-New-Windows-F
You can intercept Windows messages by adding a hook to the HwndSource.
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
source.AddHook(WndProc);
}
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam,
ref bool handled)
{
if(msg == (int)TaskbarNativeMethods.WM_DWMSENDICONICLIVEPREVIEWBITMAP)
{
// get your bitmap an SetIconicThumbnail...
}
}
Still trying to improve my code with some better features.
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