X64 Windows窗体视觉样式而不是3D

Question

在下面的代码（x64）中，尽管使用了Fixed3D样式，但表单视觉样式不是3D。显示结果窗口。 我还使用编译器指令强制使用ComCtl32.dll版本6， 但没有运气。

为什么我没有获得Visual Style 3D的任何想法？

#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")

#include <windows.h>

#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

public ref class Form1: public Form
{
public:
    Form1()
    {
        InitializeComponent();
    }

    void InitializeComponent()
    {
        Text = L"Form1";
        //Icon = gcnew System::Drawing::Icon(L"C:\\Form1.ico");
        StartPosition = FormStartPosition::WindowsDefaultLocation;

        ControlBox = true;
        MinimizeBox = true;
        MaximizeBox = false;

        Size = System::Drawing::Size(425, 308);

        FormBorderStyle = System::Windows::Forms::FormBorderStyle::Fixed3D;
    }
};

int main(void)
{
    Application::Run(gcnew Form1());

    return 0;
}