DeleteSite　メソッド

// 間取りオブジェクトへ接続
CMadoriDoc * m_MadoriDoc = new CMadoriDoc();
CLSIDFromProgID (L"MyHomeDesignerMadori.MadoriDoc", &clsid);
GetActiveObject (clsid, NULL, &pUnk);
pUnk->QueryInterface (IID_IDispatch, (void**)(&pDisp));
m_MadoriDoc->AttachDispatch (pDisp);

// 敷地を削除
long lRet = m_MadoriDoc->DeleteSite();
SafeArrayUnaccessData(pArray);