Trying to create a Math Input Panel in C#

问题

How do I create a Math Input Panel in C#?

I have tried to put it into a dll and call it but it just closes right away.

#include <stdafx.h>
#include <atlbase.h>
#include "micaut.h"
#include "micaut_i.c"

extern "C" __declspec(dllexport) int run()
{
   CComPtr<IMathInputControl> g_spMIC; // Math Input Control
   HRESULT hr = CoInitialize(NULL);
   hr = g_spMIC.CoCreateInstance(CLSID_MathInputControl);
   hr = g_spMIC->EnableExtendedButtons(VARIANT_TRUE);
   hr = g_spMIC->Show();

   return hr;
}

I call the dll function in C# and the panel pops up but disappears right away. Any suggestions?

回答1:

In your C# project, add a reference to the COM library micautLib. Then you can use the following code (in C#):

MathInputControl ctrl = new MathInputControlClass();
ctrl.EnableExtendedButtons(true);
ctrl.Show();

I'm not sure if this is exactly how you're supposed to do it, but this seems to work cleanly (complete program).

using System;
using System.Windows.Forms;
using micautLib;

namespace MathInputPanel
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            MathInputControl ctrl = new MathInputControlClass();
            ctrl.EnableExtendedButtons(true);
            ctrl.Show();
            ctrl.Close += () => Application.ExitThread();
            Application.Run();
        }
    }
}

来源：https://stackoverflow.com/questions/1623378/trying-to-create-a-math-input-panel-in-c-sharp