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POHow to center a WPF Window in a Excel VSTO addin
 

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  1. POHow to center a WPF Window in a Excel VSTO addin
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    <p>The problem is that a WPF window only takes a system.form.window so I cannot set Excel to be the owner object in my VSTO application, because the VSTO addin only exposes Excel's hwnd, or its active window as a Native Window since it is COM. That means when WindowStartUpLoadation is set to be center owner it doesn't work. So I am forced to work around this.</p> <p>What I have come up with so far after reading <a href="http://blogs.msdn.com/b/wpfsdk/archive/2007/04/03/centering-wpf-windows-with-wpf-and-non-wpf-owner-windows.aspx" rel="noreferrer">this site</a> is to try and manually center the window, but even with his simple example my window never appears centered.</p> <pre><code> private static void CenterWpfWindowInExcel(WpfParameterDialog wpfDialog) { WindowInteropHelper helper = new WindowInteropHelper(wpfDialog); helper.Owner = new IntPtr(Globals.ExcelAddin.Application.Hwnd); // Manually calculate Top/Left to appear centered double nonWpfOwnerLeft = Globals.ExcelAddin.Application.ActiveWindow.Left; // Get non-WPF owner’s Left double nonWpfOwnerWidth = Globals.ExcelAddin.Application.ActiveWindow.Width; // Get non-WPF owner’s Width double nonWpfOwnerTop = Globals.ExcelAddin.Application.ActiveWindow.Top; // Get non-WPF owner’s Top double nonWpfOwnerHeight = Globals.ExcelAddin.Application.ActiveWindow.Height; // Get non-WPF owner’s Height wpfDialog.WindowStartupLocation = WindowStartupLocation.Manual; wpfDialog.Left = nonWpfOwnerLeft + (nonWpfOwnerWidth - wpfDialog.Width)/2; wpfDialog.Top = nonWpfOwnerTop + (nonWpfOwnerHeight - wpfDialog.Height)/2; } </code></pre> <p>Any ideas?</p>
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    1. CO*Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking.*
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      1. USFederico Berasategui
    2. COI edited it a bit to clarify my meaning, does it make more sense now? I am happy to elaborate on more specific details.
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