GetComboBoxinfo API在64位操作系统中失败，错误代码为87

Question

我正在尝试将鼠标事件挂接到组合框。示例代码为here。

但是如果保留项目属性[Prefer 32 bit TRUE]则可以正常工作，但是如果我保留Prefer 32 bit FALSE，则GetComboBoxInfo API将失败，并显示错误代码87。

这里是代码失败的地方：

public static IntPtr GetChildListWindowHandle(Control ctrl)
        {
            Win32.ComboBoxInfo comboBoxInfo = new Win32.ComboBoxInfo();
            comboBoxInfo.cbSize = (uint)Marshal.SizeOf(comboBoxInfo);

            Win32.GetComboBoxInfo(ctrl.Handle, ref comboBoxInfo);
            uint error = GetLastError() ;

            if (true == Win32.GetComboBoxInfo(ctrl.Handle, ref comboBoxInfo))
            {
                return comboBoxInfo.hwndList;
            }
            return IntPtr.Zero;
        }


[StructLayout(LayoutKind.Sequential)]
        public struct ComboBoxInfo
        {

            public uint cbSize;

            public RECT rcItem;

            public RECT rcButton;

            public IntPtr stateButton;

            public IntPtr hwndCombo;

            public IntPtr hwndEdit;

            public IntPtr hwndList;
        }

 [DllImport("user32.dll")]
        public static extern bool GetComboBoxInfo(IntPtr hwndCombo, ref ComboBoxInfo info);