C#中多个Form之间调用的问题，求大神们指导一下啊。。。
我这里有两个Form1和Formht我在Formht中写了一个Report类并创建了一个Report实例report，然后我想在Form1中也能调用这个实例。。我在Form1中添加了一个Button，在Button中应该写什么代码额。。求大神指导。。。。
[code=C#][/code]public partial class Form1 : Form 
  {
  class Report
  {
  private _Application wordApp = null;
  private _Document wordDoc = null;
  public _Application Application
  {
  get
  {
  return wordApp;
  }
  set
  {
  wordApp = value;
  }
  }
  public _Document Document
  {
  get
  {
  return wordDoc;
  }
  set
  {
  wordDoc = value;
  }
  }
  // 杀掉winword.exe进程
  public void killWinWordProcess()
  {
  System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName("WINWORD");
  foreach (System.Diagnostics.Process process in processes)
  {
  bool b = process.MainWindowTitle == "";
  if (process.MainWindowTitle == "")
  {
  process.Kill();
  }
  }
  }
  }

  public Form1()
  {
  InitializeComponent();
  }

  private void button1_Click(object sender, EventArgs e)
  {

  }

  private void 借据合同ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   
  //弹出一个新的窗口，显示合同所需填写的部分
  Formht f = null;
  try
  {
  f = new Formht();
  f.ShowDialog(this);
  }
  catch (Exception exp)
  {
  MessageBox.Show(exp.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
  }


  }

  private void button3_Click(object sender, EventArgs e)
  {
  // string RepPath = @"F:\学习\soarto要求\offce小应用";
  // Report report = new Report();  
  // report.SaveDocument(RepPath);
  }
[code=C#][/code]
  public partial class Formht : Form
  {
  class Report
  {
  private _Application wordApp = null;
  private _Document wordDoc = null;
  public _Application Application
  {
  get
  {
  return wordApp;
  }
  set
  {
  wordApp = value;
  }
  }
  public _Document Document
  {
  get
  {
  return wordDoc;
  }
  set