//停止关联的进程

[System.Runtime.InteropServices.DllImport("User32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]

private static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

private void Kill(Microsoft.Office.Interop.Excel.Application excel)

{

IntPtr t = new IntPtr(excel.Hwnd); //得到句柄

int k = 0;

GetWindowThreadProcessId(t, out k);

System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);

p.Kill();

}