could not make google Earth window iconic in program

private void Form1_Load(object sender, EventArgs e)
{
    if (this.DesignMode == false)
    {
        cam.FocusPointAltitudeMode = AltitudeModeGE.RelativeToGroundAltitudeGE;
        googleEarth = new ApplicationGEClass();
        cam.Tilt = 35;
        cam.Azimuth = 0;
        numericUpDown1.Value = 250;
        cam.Range = (double)numericUpDown1.Value;
    }

}

private void InsertGoogleButton_Click(object sender, EventArgs e)
{
    int ww, ll, x;
    ww = this.Width;
    ww = (int)(88 * ww / 100);
    ll = this.Height;
    ll = (int)(88 * ll / 100);

    InsertGoogleButton.Enabled = false;
    UpdateGoogleButton.Enabled = true;

    cam.FocusPointLatitude  = Form1.Lat_1  + Form1.Lat_2  / 60  + Form1.Lat_3 / 3600;
    cam.FocusPointLongitude = Form1.Long_1 + Form1.Long_2 / 60  + Form1.Long_3/ 3600;
    cam.FocusPointAltitude = 150;
    //---------------------------------------
    cam.Tilt = 35;
    textBox1.Text = cam.Tilt.ToString();

    cam.Azimuth = 0;//stright north
    textBox2.Text = cam.Azimuth.ToString();

    cam.Range = 250;
    numericUpDown1.Value = (decimal)cam.Range;
    //----------------------------
    cam.FocusPointAltitudeMode = AltitudeModeGE.RelativeToGroundAltitudeGE;
    googleEarth = new ApplicationGEClass();

    //Hwnd wnd=googleEarth.GetMainHwnd;// <---------- may be this one
    //wnd.setIconic;//   <----------  syntax may may be like this
    //--------------------------------------

    GEHrender = (IntPtr)googleEarth.GetRenderHwnd();
    GEParentHrender = ClassGoogle.GetParent(GEHrender);

    ClassGoogle.MoveWindow(GEHrender, 0, 0, ww, ll, true);
    ClassGoogle.SetParent(GEHrender, this.Handle);
    googleEarth.SetCamera(cam, 0.25f);
}