从Windows打开调制解调器配置对话框(C#)

RunDll32是一个包含在windows中的程序,它加载DLL,并在其中运行一个函数,如命令行参数所指定的.这通常是shell(资源管理器)运行控制面板小程序的方式.

您也可以自己使用shell32函数直接加载CPL.

这是示例代码：

[System.Runtime.InteropServices.DllImport("shell32",EntryPoint = "Control_RunDLLW",CharSet = System.Runtime.InteropServices.CharSet.Unicode,SetLastError = true,ExactSpelling = true)]
private static extern bool Control_RunDLL(IntPtr hwnd,IntPtr hinst,[System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)] string lpszCmdLine,int nCmdShow);

private void showOnMainThread_Click(object sender,EventArgs e)
{
    const int SW_SHOW = 1;
    // this does not work very well,the parent form locks up while the control panel window is open
    Control_RunDLL(this.Handle,IntPtr.Zero,@"telephon.cpl",SW_SHOW);
}

private void showOnWorkerThread_Click(object sender,EventArgs e)
{
    Action hasCompleted = delegate
    {
        MessageBox.Show(this,"Phone and Modem panel has been closed","Notification",MessageBoxButtons.OK,MessageBoxIcon.Information);
    };

    Action runAsync = delegate
    {
        const int SW_SHOW = 1;
        Control_RunDLL(IntPtr.Zero,SW_SHOW);
        this.BeginInvoke(hasCompleted);
    };

    // the parent form continues to be normally operational while the control panel window is open
    runAsync.BeginInvoke(null,null);
}

private void runOutOfProcess_Click(object sender,EventArgs e)
{
    // the control panel window is hosted in its own process (rundll32)
    System.Diagnostics.Process.Start(@"rundll32.exe",@"shell32,Control_RunDLL telephon.cpl");
}