Hi, Jason, I want to change the variable in variable table by program with C++, but I find a question, program as following,

    pDis=pPartDoc->Variables;

    hr=pDis->QueryInterface(&pVars);

    pDis->Release();
//    hr=pVars->Edit("a","120"); /// It's OK!
    _variant_t v;
    v="a";
    hr=pVars->Item("a")->QueryInterface(&pVar); ///hr=NOINTERFACE

The same function in another program, the last hr's value is S_OK!

Could you help me?

Thanks!