protected override IntPtr CreateWindowOverride(ushort atom)
{
UnmanagedMethods.WindowStyles style =
UnmanagedMethods.WindowStyles.WS_POPUP |
UnmanagedMethods.WindowStyles.WS_CLIPSIBLINGS;
UnmanagedMethods.WindowStyles exStyle =
UnmanagedMethods.WindowStyles.WS_EX_TOOLWINDOW |
UnmanagedMethods.WindowStyles.WS_EX_TOPMOST;
var result = UnmanagedMethods.CreateWindowEx(
(int)exStyle,
atom,
null,
(uint)style,
UnmanagedMethods.CW_USEDEFAULT,
UnmanagedMethods.CW_USEDEFAULT,
UnmanagedMethods.CW_USEDEFAULT,
UnmanagedMethods.CW_USEDEFAULT,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero);
var classes = (int)UnmanagedMethods.GetClassLongPtr(result, (int)UnmanagedMethods.ClassLongIndex.GCL_STYLE);
classes |= (int)UnmanagedMethods.ClassStyles.CS_DROPSHADOW;
UnmanagedMethods.SetClassLong(result, UnmanagedMethods.ClassLongIndex.GCL_STYLE, new IntPtr(classes));
return(result);
}
private void EnableBoxShadow(IntPtr hwnd, bool enabled)
{
var classes = (int)UnmanagedMethods.GetClassLongPtr(hwnd, (int)UnmanagedMethods.ClassLongIndex.GCL_STYLE);
if (enabled)
{
classes |= (int)UnmanagedMethods.ClassStyles.CS_DROPSHADOW;
}
else
{
classes &= ~(int)UnmanagedMethods.ClassStyles.CS_DROPSHADOW;
}
UnmanagedMethods.SetClassLong(hwnd, UnmanagedMethods.ClassLongIndex.GCL_STYLE, new IntPtr(classes));
}