// Create PlaceHolder
PlaceHolder placeHolder = new PlaceHolder();
placeHolder.Create(oPage);
placeHolder.Location = new PointD(80.0, 200.0);
placeHolder.Name = "PlaceHolder 1";

// Add variables and set values to records
placeHolder.Variables.Add("X VAR");
placeHolder.ValueSets.Add("Set 1");
placeHolder.ValueSets.Add("Set 2");                

//setting values
MultiLangString oMultiLangString = new MultiLangString();
oMultiLangString.AddString(ISOCode.Language.L___, "test string");
placeHolder.Values["X VAR", "Set 1"] = oMultiLangString;

// Set variable for FUNC_TEXT property
Eplan.EplApi.Base.MultiLangString funcText = new MultiLangString();
funcText.AddString(ISOCode.Language.L_en_US, "<X VAR>");
placeHolder.SetPropertyEntry(oFunction, Properties.Function.FUNCTION_MESSAGETEXT, funcText);

//Apply record
placeHolder.ApplyRecord("Set 1");

//creating PlaceHolder
PlaceHolder oPlaceHolder = new PlaceHolder();
oPlaceHolder.Create(m_oTestPage);

oPlaceHolder.Variables.Add(new PlaceHolder.Variable(oPlaceHolder, "test variable 1"));
oPlaceHolder.Variables.Add("test variable 2");
oPlaceHolder.Variables.Add("test variable 3");
oPlaceHolder.Variables.Remove("test variable 2");

//adding value sets
oPlaceHolder.ValueSets.Add("value set 1");
oPlaceHolder.ValueSets.Add("value set 2");
oPlaceHolder.ValueSets.Add("value set 3");
oPlaceHolder.ValueSets.Remove("value set 1");                

//setting values
MultiLangString oMultiLangString = new MultiLangString();
oMultiLangString.AddString(ISOCode.Language.L___, "test string");
oPlaceHolder.Values["test variable 1", "value set 3"] = oMultiLangString;

//setting IsChangeable
oPlaceHolder.Variables["test variable 3"].IsChangeable = !oPlaceHolder.Variables[0].IsChangeable;
oPlaceHolder.Variables.Add("test variable 2", true);                

//clearing variables and value sets                 
oPlaceHolder.ValueSets.Clear();
oPlaceHolder.Variables.Clear();