private static void SetInternal(IntPtr handle, User32.AccentState accentState, bool showBorders = false, uint tintOpacity = 0)
{
var accent = new User32.AccentPolicy
{
AccentState = accentState,
AccentFlags = (showBorders) ? User32.AccentFlags.DrawAllBorders : User32.AccentFlags.None,
GradientColor = (_defaultTintOpacity << 24) | (_defaultTintBackgroundColor & 0xFFFFFF)
};
var accentStructSize = Marshal.SizeOf(accent);
var accentPtr = Marshal.AllocHGlobal(accentStructSize);
Marshal.StructureToPtr(accent, accentPtr, false);
var data = new User32.WindowCompositionAttribData();
data.Attribute = User32.WindowCompositionAttribute.WCA_ACCENT_POLICY;
data.SizeOfData = accentStructSize;
data.Data = accentPtr;
var ret = User32.SetWindowCompositionAttribute(handle, ref data);
Debug.Assert(ret == 0 || ret == 1);
Marshal.FreeHGlobal(accentPtr);
}
private static void SetAccentPolicy(IntPtr handle, User32.AccentPolicy policy)
{
var accentStructSize = Marshal.SizeOf(policy);
var accentPtr = Marshal.AllocHGlobal(accentStructSize);
Marshal.StructureToPtr(policy, accentPtr, false);
var data = new User32.WindowCompositionAttribData();
data.Attribute = User32.WindowCompositionAttribute.WCA_ACCENT_POLICY;
data.SizeOfData = accentStructSize;
data.Data = accentPtr;
var ret = User32.SetWindowCompositionAttribute(handle, ref data);
Debug.Assert(ret == 0 || ret == 1);
Marshal.FreeHGlobal(accentPtr);
}
