Question

XMLNotepad provides the following text (for example) when a transform fails:

Error Transforming XML
The variable or parameter ‘saturated-background-color’ was duplicated with the same import precedence.

How would I go about getting this error text programmatically? My code looks like this:

CComPtr<IXSLTemplate> tmpl; HRESULT hr = CoCreateInstance(CLSID_XSLTemplate, NULL, CLSCTX_INPROC_SERVER, IID_IXSLTemplate, (void**)&tmpl); if (SUCCEEDED(hr)) {     hr = tmpl->putref_stylesheet(xslt_doc);     if (SUCCEEDED(hr)) {     // Huzzah; do stuff.     } else {     // How do I get the error text?  I want to log it!     } } 

Answer 1

If IXSLTemplate supports IErrorInfo (AFAIK, it does), then you can query that for additional information.

(jeffamaphone clued me in on the proper way to get this – using the GetErrorInfo() API:)

CComPtr<IErrorInfo> error; if (SUCCEEDED( GetErrorInfo(0, &error) ) && error) {    // call IErrorInfo::GetDescription(), etc. }