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Hello everyone,
I'm trying to access the activex parent object and am having some troubles. I would like my ATL control invoke the navigate() function of it's container (assuming the container is IE) so that the plugin causes IE to POST some data back to the server. I am having trouble finding any documentation on if this is even possible. Here is some code I have that doesn't seem to work:
HRESULT hr;
CLSID clsid; // Class ID of the object.
LPUNKNOWN punk = NULL; // Unknown of the object.
IWebBrowserApp* ppvObject = NULL; // interface to the object
hr = CLSIDFromString(L"Shell.Explorer.2", &clsid);
// Create an instance of the object and ask for its
// IDispatch interface.
hr = CoCreateInstance(clsid, NULL, CLSCTX_SERVER, IID_IUnknown, (void **)punk);
if (SUCCEEDED(hr)) {
hr = punk->QueryInterface(IID_IWebBrowserApp, (void**)&ppvObject);
if (SUCCEEDED(hr)) {
// Create POST Data to be sent out to the server
BSTR bstrURL = NULL, bstrHeaders = NULL;
VARIANT vFlags = {0},
vTargetFrameName = {0},
vPostData = {0},
vHeaders = {0};
bstrURL = SysAllocString(L"http://www.microsoft.com");
if (!bstrURL)
{//TODO: error handling
}
bstrHeaders = SysAllocString(L"Content-Type: application/x-www-form-urlencoded\r\n");
if (!bstrHeaders)
{ //TODO: error handling
}
V_VT(&vHeaders) = VT_BSTR;
V_BSTR(&vHeaders) = bstrHeaders;
hr = GetPostData(&vPostData);
//Send data out to the server
hr = ppvObject->Navigate(bstrURL, &vFlags, &vTargetFrameName, &vPostData, &vHeaders);
ppvObject->Release();
}
punk->Release();
}
}
HRESULT GetPostData(LPVARIANT pvPostData); // do some stuff to the data
Any Ideas what I'm doing wrong? This is probably going to open a random web connection, not the parent window. I think there has to be an easier way. and one that works!
thanks.
UPDATE: should I use AtlAxGetHost()??? If so, then how do i get the HWND?
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I'm replying to myself so that if anyone else is trying to do this they won't go crazy like me. Here's what you need to do: (error checking omited)
IOleContainer* pContainer;
IServiceProvider* pService;
IWebBrowser2* pBrowser;
HRESULT hr;
hr = m_spClientSite->GetContainer(&pContainer);
hr = pContainer->QueryInterface(IID_IServiceProvider,(void**)&pService);
hr = pService->QueryService(SID_SWebBrowserApp, IID_IWebBrowser2, (void**)&pBrowser);
Now... does anyone know how to make this work in Netscape using the npmozax.dll plugin?
-pos
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How can an ATL in-proccess be client ,in a nother word how it can call another
Acticex Dll and wich is the best function can do that
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MyActiveX::CallOther()
{
CoCreateInstance(YourActiveX);
// Not proper code, but you get the idea
}
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Hi,
Could I use a smart pointer instead of CoCreateInstance(...)??
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Yes, and you could also read a book or other documentation.
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I develop application in VC++ I need to use com dll in another com dll,is it possible??
Thnks
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Of course. If your module supports a dual interface add a header file created by MIDL compiler to the project and you can use the powerful of vtable. If your COM module implements only IDispatch you have to generate a class derived from COleDispatchDriver ( by ClassWizard).
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Hello every1!
I am looking at some sample code that microsoft is giving out with MSDN and i can't understand what is going on...if some1 knows it...
Here's the problem - the project palmap(can be found in any MSDN library) is a dll file that is used as an extension of aviview(a prog for viewing avi files and also can be found in the MSDN). A part of the source of palmap.c says:
typedef struct {
IAVIStreamVtbl FAR * lpVtbl;
ULONG ulRefCount;
//
// instance data
//
PAVISTREAM pavi;
PGETFRAME pgf;
AVISTREAMINFO sinfo;
HPALETTE hpal;
LPBYTE lp16to8;
LONG lLastFrame;
LPBITMAPINFOHEADER lpdibLast;
} PALMAPSTREAM, FAR*PPALMAPSTREAM;
There is something sneaky in this struct since IAVIStreamVtbl is defined nowhere(i checked the headers and tried to see if any IDLs exist). I searched the whole project directory for that string and there is no match. It is obviously the vtable and also has an interface prefix but i don't find any interface definitions too. BTW: i tried to look for the definition by clicking with the right button on the "IAVIStreamVtbl" and choosing "Goto definition...." but there is no brosing files with that project. After building the project there are no errors or warnings. so - Where could this IAVIStreamVtbl be defined?
Thanks for any reply!
Vladimir Ralev
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Look for a #import statement. Look for xxxx_i.h file after the compile.
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Are there any good code samples available on this site (or elsewhere) that I can use to get idea of the workings of a COM+ application? I already have a pretty good textbook understanding of COM+.
Thanks for your help!
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I have out parameter as IUnknown** on the server side method
Method(IUnknown** ptrIUnknown)
Now on the client side , how do i call the method
i declared
IUnknown* pIUnk;
Then I call some method
Method(&pIUnk);
but IUnknown pointer does not get filled up
what is the mistake in this ?
parag
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hi
I want some good samples on aggregation ?Where can I find links for this?
please help
Pathi
bhikshapathi_g@semanticspace.com
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I am using visual basic to develop an application using a VB ActiveX dll I have created a multithreading tech. using window API function CreateThread(...) like this :-
------------------------This laid in XClass in the ActiveX dll-------------
lRet = CreateThread(0, _
0, _
AddressOf TheThread, _
0, _
0, _
lThreadID)
----------------------------This thread Function is laid in some module-------
Public Function TheThread(ByRef p As PARAMETER) As Long
On Error GoTo TheThread_Error
XClass.SpecialFunction Exit Function
TheThread_Error:
MsgBox ("TheThread had an error : " + Err.Description)
End Function
But there is a run time error message comes up say "CoInitialize has not been called"
Can some body help me.
Thanks.
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You must initialize the COM libraries in each thread to be able to use it. If you need to do multi-threading I would give up on VB and use C++.
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If I use Microsoft Agent 2.0 com Interface for programming,
(Microsoft Visual C++6.0)
how can I add a button or CheckList on WordBalloon like Microsoft Office Assistants?
if you know,Can you tell me?
Thank you !
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I have written a program using the MSComm Active X component.
Now I'm on the point that I want to make an install shield
for this program. What is the best way to do this when I want
to register the MSComm component to the OS automatically?
Any tips and tricks are welcome.
Regards,
J hn
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What version of Installshield are you using?
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install shield for Microsoft Visual C++ 6.0
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Hi John,
I wrote program with MSCOMM, too.
But my program have problem in sending and recieving data !!!
Of course i use of SetOutput() and GetInput(),
But ...
Can you explain to me, why ???
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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I have sent you examples by e-mail.
John
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Hello,
I wrote a COM DLL with an interface: IMyInterface.
I added to the project a dialog (inherits from CDialog): CMyDlg.h and CMyDlg.cpp.
In the class of the interface I added:
CMyDlg m_dlg;
and when I call: m_dlg.DoModal()
it fails in DestroyWindow() inside the DoModal
function.
What did I do wrong?
I only need to open and close a regular dialog
through an interface!
Thank you,
Penina.
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Does anyone knows how to change the format of
a pin?
I can change it in the GraphEditor, but I don't know how
to change it in code.
(I need to change the size of the frame to 320*240).
Thank you.
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i use the ATL wizard create a COM service.When I execute the
command "myservice.exe /Service" on the computer ,not install VC(NT4 SP4),I can't register it.
but when i can execute the command succefully on the computer with vc6.
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Sounds like your missing a file, or files, on the non-development machine. Use depends and make sure all files are present on the target system.
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