internal static bool TrySetFormChildWindowStyle(Form form)
{
long newStyle = (long)USER32.GetWindowLongPtr(form.Handle, GWL_STYLE);
if (newStyle == 0)
{
return(false);
}
newStyle = (newStyle | WS_CHILD) & ~WS_POPUP;
return(USER32.SetWindowLongPtr(form.Handle, GWL_STYLE, (IntPtr)newStyle) != IntPtr.Zero);
}