private static bool _SetWindowThemeAttribute(Window window, bool showCaption, bool showIcon)
{
bool isGlassEnabled;
Assert.IsNotNull(window);
Assert.IsTrue(window.CheckAccess());
// This only is expected to work if Aero glass is enabled.
try
{
NativeMethods.DwmIsCompositionEnabled(out isGlassEnabled);
}
catch (DllNotFoundException)
{
// Not an error. Just not on Vista so we're not going to get glass.
return false;
}
IntPtr hwnd = new WindowInteropHelper(window).Handle;
if (IntPtr.Zero == hwnd)
{
throw new InvalidOperationException("Window must be shown before we can modify attributes.");
}
var options = new WTA_OPTIONS
{
dwMask = (WTNCA.NODRAWCAPTION | WTNCA.NODRAWICON)
};
if (isGlassEnabled)
{
if (!showCaption)
{
options.dwFlags |= WTNCA.NODRAWCAPTION;
}
if (!showIcon)
{
options.dwFlags |= WTNCA.NODRAWICON;
}
}
NativeMethods.SetWindowThemeAttribute(hwnd, WINDOWTHEMEATTRIBUTETYPE.WTA_NONCLIENT, ref options, WTA_OPTIONS.Size);
bool addHook = !_attributedWindows.ContainsKey(hwnd);
if (addHook)
{
HwndSourceHook hook = delegate(IntPtr unusedHwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (WM.DWMCOMPOSITIONCHANGED == (WM)msg)
{
_SetWindowThemeAttribute(window, showCaption, showIcon);
handled = false;
}
return IntPtr.Zero;
};
_attributedWindows.Add(hwnd, hook);
HwndSource.FromHwnd(hwnd).AddHook(hook);
window.Closing += _OnAttributedWindowClosing;
}
return isGlassEnabled;
}
public static extern void SetWindowThemeAttribute([In] IntPtr hwnd, [In] WINDOWTHEMEATTRIBUTETYPE eAttribute, [In] ref WTA_OPTIONS pvAttribute, [In] uint cbAttribute);
private static bool _SetWindowThemeAttribute(Window window, bool showCaption, bool showIcon)
{
bool isGlassEnabled;
Assert.IsNotNull(window);
Assert.IsTrue(window.CheckAccess());
// This only is expected to work if Aero glass is enabled.
try
{
isGlassEnabled = NativeMethods.DwmIsCompositionEnabled();
}
catch (DllNotFoundException)
{
// Not an error. Just not on Vista so we're not going to get glass.
return(false);
}
IntPtr hwnd = new WindowInteropHelper(window).Handle;
if (IntPtr.Zero == hwnd)
{
throw new InvalidOperationException("Window must be shown before we can modify attributes.");
}
var options = new WTA_OPTIONS
{
dwMask = (WTNCA.NODRAWCAPTION | WTNCA.NODRAWICON)
};
if (isGlassEnabled)
{
if (!showCaption)
{
options.dwFlags |= WTNCA.NODRAWCAPTION;
}
if (!showIcon)
{
options.dwFlags |= WTNCA.NODRAWICON;
}
}
NativeMethods.SetWindowThemeAttribute(hwnd, WINDOWTHEMEATTRIBUTETYPE.WTA_NONCLIENT, ref options, WTA_OPTIONS.Size);
bool addHook = !_attributedWindows.ContainsKey(hwnd);
if (addHook)
{
HwndSourceHook hook = delegate(IntPtr unusedHwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (WM.DWMCOMPOSITIONCHANGED == (WM)msg)
{
_SetWindowThemeAttribute(window, showCaption, showIcon);
handled = false;
}
return(IntPtr.Zero);
};
_attributedWindows.Add(hwnd, hook);
HwndSource.FromHwnd(hwnd).AddHook(hook);
window.Closing += _OnAttributedWindowClosing;
}
return(isGlassEnabled);
}
