Programatically (C#) update QC/ALM Test Plan > Test Script tab content

SOLUTION:

1. run the first 6 lines of code in step 5 to create a VAPI-XP-TEST.

2. In the created test > Test Script tab, go to the referenced Script path in Windows Explorer. Looks something like this:

   C:Usersuser_idAppDataLocalTempTD_80ip_addresshex_codeTest

3. open any child node folder path all the way until you see a test.sr file

4. Copy the test.sr file to the same folder as your VB Script file

5. change C# code as follows:

   
        TestFactory TF = qc.TestFactory; // qc is the ALM connection
        Test test = (Test)TF.AddItem(System.DBNull.Value);
        test["TS_NAME"] = "test name";
        test["TS_TYPE"] = "VAPI-XP-TEST";
        test["TS_SUBJECT"] = "Test Plan folder path/node id";
        test.Post();
        // add your script.vbs to Test Script tab of Test Plan test. 
        var es = test.ExtendedStorage; 
        es.ClientPath = "folder of your script.vbs and copied test.sr file"; 
        es.Save("script.vbs, test.sr", true);
    

6. re-run your C# code and check Test Script tab of Test Plan test to see your VB script.