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What is the best way to get an IStream interface pointer on an existing file? I am using Visual C++ 6.0.
Man Learns from History that he never learns from History
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AFAIK, there is no known implementation for files. I implemented it myself, which is pretty straight forward.
--
Ich bin Joachim von Hassel, und ich bin Pilot der Bundeswehr.
Welle: Erdball - F104-G Starfighter
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I found the SHCreateStreamOnFile function. Was wondering if there was somthing in the STG group of functions that I could use.
Man Learns from History that he never learns from History
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Hey, thanks for the function. I haven't seen it before, and certainly not in the STG headers.
![Beer | [beer]](https://codeproject.freetls.fastly.net/script/Forums/Images/beer.gif)
--
Ich bin Joachim von Hassel, und ich bin Pilot der Bundeswehr.
Welle: Erdball - F104-G Starfighter
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I have one module in Labview and other one in MFC ,how i could integrate MFC with Labview.
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i have used [in,out] in my COM method but when i call my method from ASP it gives error "Type mismatch: methodname" . i have also used CInt() for my int variables , but now it shows nothin when i respons.write my variable.
e.g
In COM
power([in]int num,[in] int pNum,[in,out] int *res)
In ASP , i calling it
myObj.power num1,num2,CInt(num3) 'this gets nothin in num3
if i go like that
myObj.power num1,num2,num3 'gives error Type Mis-match:power
aby idea abt this????
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Ok, just making sure here:
The reason you make it [in,out] is because you provide some information and expect possible different information back, right ?
If not, if all you want is to return a value, you should use [out] only, althought for int values it shouldnt make much of a difference. If you return only 1 value, i suggest you use [out, retval], in which case, you can assign to a variable like: var = myObj.power(num1, num2).
If you use CInt(num3), ASP actually creates a new, invisible, variable to store the conversion and your returned value isnt accessible, even if it is actually returned somewhere.
what you might also need is the equivalent of addressof(var), or &var in your script engine. so you might have to do something like myObj.power num1, num2, addressof(num3). I'm not sure exactly if this is a requirement but i expose it just in case.
by the way, which scripting language are you using ? VBScript or JavaScript ?
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Yes , u r right, i want to provide some info to method and get processed info from method. i have used [out,retval] , it works fine but i want to get multiple variables out of method that's y using [in,out]. i m using VB Script. well is there any addressof(var) operator exists in VB script. if so do tell me or any equivalent function to do this.
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Hmmmmm, VBScript...
Ok, do you declare your variables before using them ?
Dim num3 as Integer
myObj.power 2, 3, num3
this should theoreticly work. Reason should be, if you dont declare your variable, the variable is defined as type Variant which is not what myObj.power expects.
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hi
If u want to return a value back to asp from an interface method, that variable shud b of type VARIANT type. There is no other go. So the IDL shuld be [in, out] VARIANT *pOut1, [in, out] VARIANT *pOut2, ..., ... for all the variables u need to return a value back to asp. This way u can have any number of in-out parameters for an interface method.
rgds.. mil10
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i wrote an active control using ATL,and put it in webpage,it shows
well in IE6.0 but,it can not show itself in mozilla 1.6 ,that's why?
generally says i am not familar with mozilla
thanks for any help
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hi ,
IE is an activex control container ( As it is from MS ). Where as Mozilla is a open source initiative. Mozilla browser is not an Ax control container.
Besides Mozilla browser is x-platform browser. there is no equivalent of COM/OLE/ActiveX in linux.
Hope this helps
Praseed Pai
www.codeproject.com
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hello !
i just want to know that a component built using STA cant be used in an MTA environment.
And if i want to do this , how this can be done?
the_sikander
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I am looking for a tutorial on making a COM dll in VC++. I've searched Code Project articles and the web at large without success. 
Can anyone point me toward a resource?
<signature>
It's good to live,
Josef Wainz
Software Developer
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Thanks for the article pointer. I still find the Code Project menus less than intuitive. I did a search on articles with the criteria of 'COM dll tutorial' and no articles were found.
I spend so much time here, I need to spend some time learning how to better navigate the site.
<signature>
It's good to live,
Josef Wainz
Software Developer
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Using the search system is very difficult IMO. I go directly to a category which I believe matches what I want to find, and do CTRL+F on that page, or I google for it. Most of the times I end up here at CP using google. 
--
Ich bin Joachim von Hassel, und ich bin Pilot der Bundeswehr.
Welle: Erdball - F104-G Starfighter
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Hi,
I am automating Word 2000 and I want to disable the "Ctrl C" keyboard functionality. (Using VBA I am successful in disabling the "Ctrl+C" by doing this - "Application.FindKey(BuildKeyCode(wdKeyControl, wdKeyC)).Disable")
I am using the following C++ automation code which gives me the DISP_E_EXCEPTION error code on IDispatch::Invoke for "Disable" method ("AutoWrap" function below is a wrapper around IDispatch::Invoke). Here is my C++ code:
parm1.vt = VT_I4;
parm1.lVal = wdKeyControl;
parm2.vt = VT_I4;
parm2.lVal = wdKeyC;
VariantClear(&result);
AutoWrap(DISPATCH_METHOD, &result, pWdApp, L"BuildKeyCode",2,parm2,parm1);
parm1.vt = VT_I4;
parm1.lVal = result.lVal;
VariantClear(&result);
AutoWrap(DISPATCH_PROPERTYGET , &result, pWdApp, L"FindKey", 1,parm1);
pWdKey = result.pdispVal;
AutoWrap(DISPATCH_METHOD, NULL,pWdKey , L"Disable", 0);
Error :
"This method or property is not available because this document is in another application"
I will appreciate any help on this.
Thanks.
Vishal More
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Hello,
I just want to show up an RTF report file previously created using automation into a non-modal dialog.
CRichText activeX control does not work for this purpose as shows tables, headers etc... diferent from what is into RTF file.
I've read about Active Document and the ability to use MS Word seamessly into my aplication.
I've downloaded a couple of examples and read a bit about (hard to implement technology, my aplication doesn´t support (i.e. didn't check active container support in wizard when created).
It looks that MS Word (or any other active document) takes control of the aplication (menus, look & feel, etc..)
I would like to avoid using active document technology as looks hard to implement from scrach. But if necessary, and before start learning it. I would like to know if active document will allow me to hide *ALL* menu, rules and hassle around the document itself and will let me put it into a dialog with a just print button.
I would really appreciate any comment, help.
Regards,
Carlos.
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i m using PWS on win98. i have made a COM object and then i used it in my ASP page. But when i used my COM object in ASP after that i can't build same COM object again without restarting my machine.it gives linkin error "Can't open .dll to change". Any one can help me so that i dont have to restart my machine.
and second question is how can i return multiple values by reference from COM object to ASP page when i use it in ASP.
any one has any idea?????
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I have a vague memory that this does not work on Win98 but on other platforms it does:
1) Configure your ASP App as "Isolated Process" in the IIS settings.
2) Stop the Web Server
3) "Unload" the application in the IIS Application Properties
4) Compile
5) Start Web Server
"No matter where you go, there your are." - Buckaroo Banzai
-pete
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Excellent post Mike!
psacake.com .... Great domain name 
"No matter where you go, there your are." - Buckaroo Banzai
-pete
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Guyz,
I remember working with C++ COM, I could use QueryInterface to find whether an interface is supported in a component. Is there a similar mechanism in VB too? If not what would be a best way to do.
\Thnx!
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LOL,
This comes along with a question of mine that probably can answer your question
If i'm not crazy, it should be possible to query for interfaces using CType(), and my question is related to CType.
Say i have a COM object with multiple inherited interfaces like:
interface IFoo : IDispach
{
.. blah ...
}
interface IOtherFoo : IFoo
{
.. blah ...
}
Now, in some way i have a method somewhere that returns an IFoo object:
[id(4), propget] Foo([out, retval] IFoo ** rvIFoo);
now, in VB i do Set MyObj = someobject.Foo. Then later i do Set MyObj2 = CType(MyObj, IOtherFoo). Will MyObj2 be the IOtherFoo interface of the same instance as MyObj ?
PS: From searches i've done, CType() seems to be only valid in VB.NET.
Is there an equivalent to CType() in VB 6.0 ?
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