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object o=new Assembly.LoadFile(mod).CreateInstance("typename");
if(o!=null && o is 类名)
{
(o as 类名).text();
}
/// <summary>
/// 原型是 :HMODULE LoadLibrary(LPCTSTR lpFileName);
/// </summary>
/// <param name="lpFileName">DLL 文件名 </param>
/// <returns> 函数库模块的句柄 </returns>
[DllImport("kernel32.dll")]
static extern IntPtr LoadLibrary(string lpFileName);
/// <summary>
/// 原型是 : FARPROC GetProcAddress(HMODULE hModule, LPCWSTR lpProcName);
/// </summary>
/// <param name="hModule"> 包含需调用函数的函数库模块的句柄 </param>
/// <param name="lpProcName"> 调用函数的名称 </param>
/// <returns> 函数指针 </returns>
[DllImport("kernel32.dll")]
static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);
/// <summary>
/// 原型是 : BOOL FreeLibrary(HMODULE hModule);
/// </summary>
/// <param name="hModule"> 需释放的函数库模块的句柄 </param>
/// <returns> 是否已释放指定的 Dll</returns>
[DllImport("kernel32", EntryPoint = "FreeLibrary", SetLastError = true)]
static extern bool FreeLibrary(IntPtr hModule);
/// <summary>
/// Loadlibrary 返回的函数库模块的句柄
/// </summary>
private IntPtr hModule = IntPtr.Zero;
/// <summary>
/// GetProcAddress 返回的函数指针
/// </summary>
private IntPtr farProc = IntPtr.Zero;
/// <summary>
/// 获得函数指针
/// </summary>
/// <param name="lpFileName"> 包含需调用函数的 DLL 文件名 </param>
/// <param name="lpProcName"> 调用函数的名称 </param>
public void LoadFun(string lpFileName, string lpProcName)
{ // 取得函数库模块的句柄
hModule = LoadLibrary(lpFileName);
// 若函数库模块的句柄为空,则抛出异常
if (hModule == IntPtr.Zero)
throw (new Exception(" 没有找到 :" + lpFileName + "."));
// 取得函数指针
farProc = GetProcAddress(hModule, lpProcName);
// 若函数指针,则抛出异常
if (farProc == IntPtr.Zero)
throw (new Exception(" 没有找到 :" + lpProcName + " 这个函数的入口点 "));
}