Invoking FuncPtr that requires object ptr param

Hi,

Apparently my last post didn't make it to the list...but it's probably
clearer to start a new post with a different, clearer heading anyway as
the issue has "progressed"!

I am now in a position whereby I have created a FuncPtr, and need to
invoke it.

However, the method signature (see below) takes a IEngine ptr as it's 4th
paramter.  I'm therefore stuck on how to invoke this!  Reading the docs, I
am thinking that I have to call the generic invoke method (although it
does return an 'int'), but I don't know how to pass the ptr.

Can anybody advise, please?

Thanks!

David

Here's the method sig from the docs:
HRESULT __stdcall GetEngineObject(
                         BSTR DeveloperSN,
                         BSTR Reserved1,
                         BSTR Reserved2,
                         IEngine** Engine);

Parameters
DeveloperSN
[in] A string containing developer serial number that matches the
necessary license.
Reserved1
[in] Reserved for future use. The empty string "" or Null pointer must be
passed.
Reserved2
[in] Reserved for future use. The empty string "" or Null pointer must be
passed.
Engine
[out] A pointer to IEngine* pointer variable that receives the interface
pointer to the resulting Engine object.

----------------------------
and here's the XML that Jawin browser generated:
<function name="GetEngineObject" description="Initializes ABBYY FineReader
Engine and returns Engine object." helpFile="c:\program files\abbyy
finereader engine 7.1\bin\..\Help\../Help/FREngine.chm"
helpReference="1100" invokeKind="DISPATCH_METHOD"
functionKind="FUNC_STATIC" paramCount="4" optionalParamCount="0"
vTableOffset="0">
 <return propertyType="25" typeName="int" typeString="VT_HRESULT"
typePointer="VT_PHRESULT" javaString="int"
javaObjectType="java.lang.Integer" javaSignature="V"
javaNativeString="jint" javaNativeArray="jintArray" cppString="DWORD"
cppDirect="VTS_HRESULT" cppPointer="VTS_PHRESULT">
  <idl flag="null"/>
 </return>
 <parameter name="DeveloperSN" type="8" typeName="String"
typeString="VT_BSTR" typePointer="VT_PBSTR" javaString="String"
javaObjectType="java.lang.String" javaSignature=""
javaNativeString="jstring" javaNativeArray="jobjectArray"
cppString="CComBSTR" cppDirect="VTS_BSTR" cppPointer="VTS_PBSTR">
 </parameter>
 <parameter name="Reserved1" type="8" typeName="String"
typeString="VT_BSTR" typePointer="VT_PBSTR" javaString="String"
javaObjectType="java.lang.String" javaSignature=""
javaNativeString="jstring" javaNativeArray="jobjectArray"
cppString="CComBSTR" cppDirect="VTS_BSTR" cppPointer="VTS_PBSTR">
  <modifier flag="NONE"/>
  <modifier flag="IN"/>
  <modifier flag="OPT"/>
  <modifier flag="HAS_DEFAULT"/>
  <idl flag="null"/>
 </parameter>
 <parameter name="Reserved2" type="8" typeName="String"
typeString="VT_BSTR" typePointer="VT_PBSTR" javaString="String"
javaObjectType="java.lang.String" javaSignature=""
javaNativeString="jstring" javaNativeArray="jobjectArray"
cppString="CComBSTR" cppDirect="VTS_BSTR" cppPointer="VTS_PBSTR">
  <modifier flag="NONE"/>
  <modifier flag="IN"/>
  <modifier flag="OPT"/>
  <modifier flag="HAS_DEFAULT"/>
  <idl flag="null"/>
 </parameter>
 <parameter name="Engine" type="26" typeString="VT_PTR"
typePointer="VT_PPTR" javaString="void" javaObjectType="java.lang.Object"
javaSignature="V" javaNativeString="jobject"
javaNativeArray="jobjectArray" cppString="void*" cppDirect="VTS_PTR"
cppPointer="VTS_PPTR">
  <pointer type="26" typeString="VT_PTR"
typePointer="VT_PPTR" javaString="void" javaObjectType="java.lang.Object"
javaSignature="V" javaNativeString="jobject"
javaNativeArray="jobjectArray" cppString="void*" cppDirect="VTS_PTR"
cppPointer="VTS_PPTR">
   <pointer type="26" typeString="VT_USERDEFINED"
typePointer="VT_PVARIANT" javaString="Object"
javaObjectType="java.lang.Object" javaSignature=""
javaNativeString="jobject" javaNativeArray="jobjectArray"
cppString="COleVariant" cppDirect="VTS_VARIANT" cppPointer="VTS_PVARIANT">
   </pointer>
  </pointer>
  <modifier flag="NONE"/>
  <modifier flag="OUT"/>
  <modifier flag="RETVAL"/>
  <idl flag="null"/>
 </parameter>
</function>