How to create data type programati​cally

Question

Hello,
we are writing a custom sequence editor that will generate TestStand sequence. I can populate the generated TS sequence sequence with steps using primitive arguments like Boolean, String, Number. Our test methods also use structures and I am having problem with programatically creating custom data type that matches C# struct similarly as one would do in SeqEdit.exe
I am assuming that there is something to do with Engine.NewDataType() and create new container, but then where to add the returned PropertyObject for it to be a type in the current sequence with a name?
Roman

Answer 1

Ray, that's great. This pointed me to right direction, thank you!
In case someone else needs this; The example worked fine from TestStand, but not from C# :
PropertyObjectFile[] typeFiles = MyEngine.GetTypePaletteFileList();
PropertyObjectFile typeFile = typeFiles[0];
TypeUsageList typeList = typeFile.TypeUsageList;
string whyNotValid = typeList.ValidateNewTypeName(name, false, out isValidName);
if (!isValidName)
return null;
PropertyObject newType = MyEngine.NewPropertyObject(PropertyValueTypes.Prop​ValType_Container, false, "", 0);
newType.NewSubProperty("MyNum", PropertyValueTypes.PropValType_Number, false, "", 0);
newType.SetValNumber("MyNum", 0, 123.0);
newType.NewSubProperty("MyStr", PropertyValueTypes.PropValType_String, false, "", 0);
newType.SetValString("MyStr", 0, "AA");
newType.Name = name;
typeList.InsertType(newType, 0, TypeCategories.TypeCategory_CustomDataTypes);
typeFile.IncChangeCount();
typeFile.SaveFileIfModified(false);
SetValNumber and SetValString threw an exception on non-existing sub-property so I added the red lines.
There is one feature not mentioned in example - If you want to have the type in the sequence file instead of INI type files, it also works like this
 PropertyObjectFile typeFile = MySequenceFile as PropertyObjectFile;