Here's a MS official example of

But this is supposed to be for C#. How about my C project?

Edit: I find this, https://www.codeproject.com/Articles/43309/How-to-create-a-simple-XML-file-using-MSXML-in-C

The first thing you need to do is add these two lines in the project stdafx.h file:

#import "MSXML4.dll" rename_namespace(_T("MSXML"))
#include <msxml2.h>

I modified this MSXML4.dll to my newly MSXML6.dll, but the project can't find it still.

CodePudding user response：

The sample code is using _com_ptr_t, a COM smart pointer class template provided by Visual Studio. Yet the code provided is incomplete.

To declare a _com_ptr_t specialization for any given interface you would usually use the _COM_SMARTPTR_TYPEDEF macro. In this case the following declarations need to be added:

_COM_SMARTPTR_TYPEDEF(IXMLDOMDocument2, __uuidof(IXMLDOMDocument2));
_COM_SMARTPTR_TYPEDEF(IXMLDOMSchemaCollection2, __uuidof(IXMLDOMSchemaCollection2));

This declares the types IXMLDOMDocument2Ptr and IXMLDOMSchemaCollection2Ptr as specializations of _com_ptr_t, ready to be used. You'll need to #include <comip.h>, too.

An alternative would be to use the compiler specific #import directive. This generates header files from a type library (TLB), and by default includes the respective _COM_SMARTPTR_TYPEDEF declarations (see Primary type library header file).

CodePudding user response：

From this demo The first thing you need to do is add these two lines in the project stdafx.h file:

#import "MSXML6.dll" rename_namespace(_T("MSXML"))
#include <msxml2.h>

Then correct all the MSXML2 to MSXML, as we specified the name rename_namespace(_T("MSXML")).

I didn't bother to do this, I at first tried namespace MSXML2=MSXML didn't work. So I just defined a MACRO #define MSXML2 MSXML. It compiled!