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The IDL file can be as simple as this;
import "oaidl.idl";
import "ocidl.idl";
[
uuid(FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF),
version(1.0),
helpstring("myapp library")
]
library MyApp
{
importlib("stdole32.tlb");
importlib("stdole2.tlb");
};
You don't even need to use a different UUID, since you're not going to be registering it.
Your 'dummy' can be either, I tend to use DLL out of habit, since I write in-proc servers quite often 
Steve S
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Hello Everyone
Could you tell me How to launch a console simply from a wtl project?(Only launch)
Thank you.
-Freehawk
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I'm using a CTreeViewCtrl in my project. It works great except for one small problem. When I change the system UI appearance to something like "Plum" so that the background color changes the tree has problems. When you expand an item in the tree sometimes the newly visible items are drawn with a white background. Is there a workaround?
I'm using Win2000, VS .Net 2002, and WTL ver 7.0. I'm kinda in the middle of the project so I figured I'd finish it before switching over to WTL 7.1. Is this something that was fixed in 7.1 and I should just switch over to it?
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Hi
I try to insert in ATL dialog my oneself ActiveX object (
ATL composite control) but wizard not found this one(in dialog box of wizard i not see it), althought when i insert it from Add to project -> Components & Control wizar i see one into list.Why???I can't use Add to project -> Components & Control wizard because of my ATL dialog allocated in ATL project without MFC support.
Thanks
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Looks like your activex is not registered
Edward.
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My interface member is a BSTR Sum.
<br />
{<br />
BSTR bBuff = 0;<br />
SysAllocStringLen(bBuff,20);<br />
m_Sum = _itow((Num1 + Num2),bBuff,10);<br />
return S_OK;<br />
}
It's cilent is a WIn32 Application. I just want to TextOut this BSTR.How to do it?
One more thing if I want to pass data from ATL server to Client, how to do it using methods. I am straightaway using Interface data member for it.
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I'm guessing this is not a UNICODE build 
If this isn't an option, then you can use various methods to convert the BSTR to a regular char 'string'.
There's an atlconv.h which you can include, then have code like this;
{
USES_CONVERSION;
TCHAR* p = W2T( bBuff );
TextOut(....);
}
Alternatively if your client uses MFC you can use
CString tmp( yourBSTR );
since CString has a conversion method.
Another alternative is to use WideCharToMultiByte to do the conversion. (It's what the conversion macros in atlconv.h use, I believe...)
Steve S
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Thanx. that was a great help to me. I am using Win32 SDK. Is development in Win32SDK has more overhead then that of MFC?
I use WIn32SDK because I am able to understand the flow, while I tried MFC at times and it seems to be overwhelming.
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Development can take longer using raw SDK. Depends how well you 'grok' the framework. I tend to use WTL rather than MFC, unless I have a particular need for MFC specific features, such as support for OLE compound documents.
In many cases, the framework obscures your view of what's happening, until you understand it, and then it accelerates development; class = code you don't have to write.
Lots of my test apps though are pure SDK, but short.
Steve S
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Even eaiser:
::TextOutW(...)
No need for conversion at all
Edward
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Continuing same discussion. What I want to do is to pass a BSTR from a ATL DLL to a Client? Now since Interface method can return only HRESULT. I will store the values in a Global Variable and use it in the client. Is there in Flaw on Design? I need feedback.
By the way I didn't see anything like TextOutW in MSDN. Please help
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My fellow poster with no name is correct that you can use TextOutW. But unfortunately, if you run your client app on Win9x or WinME, then it won't work, as that doesn't implement TextOutW, which is why I didn't suggest it (you didn't say it was NT/2K/XP/03, so I assumed it could be any.
Many API calls that take strings or characters as parameters have two versions, an ANSI version, and a UNICODE (or wide character) version. Although you use TextOut, in reality you're using either TextOutA or TextOutW, depending on whether you're compiling with _UNICODE and UNICODE defined. If you examine some of the Windows header files, you'll see definitions for both A and W functions, and then a macro which defines the base name (without A or W) as one or the other.
If you've unintentionally screwed up a parameter list to CWnd::SetWindowText, for example, the compiler will often complain about 'SetWindowTextA' or 'SetWindowTextW', rather than SetWindowText, because it's getting the definition of what the word 'SetWindowText' should be from a windows header.
Any time you see a reference to a function that ends with W or A, try looking in MSDN for the name without that trailing letter.
MEANWHILE, back to your original question;
There is a BIG flaw in your design. In the case of an in-proc ATL DLL, the global would be addressable, but that sure isn't how it's supposed to be done.
Although the method can only return an HRESULT, you can pass pointers to things in, and have the method assign values indirectly (equivalent to VB's ByRef, rather than ByVal).
An example would be:
IDL Definition:
HRESULT GetMyName( [out, retval] BSTR* pName );
HRESULT CMyObj::GetMyName( BSTR* pName)
{
if (pName == NULL)
{
return E_POINTER; // Bad address passed in...
}
*pName = SysAllocString(L"Steve Spencer");
return S_OK;
}
Client code:
BSTR t = NULL; // Empty BSTR
if (SUCCEEDED(pObj->GetMyName( &t )))
{
// woohoo! We got a result...
}
else
{
// Handle your error gracefully...
}
This works because a BSTR is a pointer; you pass in the address of the pointer, and the server (your ATL DLL) fills in the value for the pointer (hence '*pName' instead of 'pName'). You also have to mark the parameter as [out] so that the marshalling code knows how to transfer data. It's marked as [retval] so that VB programmers can use your object and treat that interface method as returning a string. (BSTR means 'BASIC String')
Hope this helps
Steve S
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 I have found the best way!!!
CComBSTR some(CString("some"));
CString some1= some;
CComBSTR and CString are exellent together!!!
================================
My Home is here!
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I wish to work with the main window area in Internet Explorer and I want to get its coordinates. I have used the following:
long lpl = 0, lpt = 0, lpw = 0, lph = 0;
m_spWebBrowser2->get_Left(&lpl);
m_spWebBrowser2->get_Top(&lpt);
m_spWebBrowser2->get_Height(&lph);
m_spWebBrowser2->get_Width(&lpw);
then converted the client points to Windows points:
int npl = 0, npt = 0, npr = 0, npb = 0;
npt = (int) lpt; //top
npl = (int) lpl; //left
npr = (int) lpw + npl; //right
npb = (int) lph + npt; //bottom
m_spWebBrowser2->ClientToWindow(&npt, &npl); //top left
m_spWebBrowser2->ClientToWindow(&npb, &npr); // bottom right
Unfortunately this does not seem to work. First I noticed that the values returned for the top left corridnates of the window are not consistant. Everytime I open the browser they change position even though the browser opens in the same size and location. secondly, if I create a RECT out of these corridnates and pass that into a create dialog function the window created does not cover the whole area.
RECT rctB = {npl, npt, npr, npb};
m_hwndDialog = m_dlgDialog.Create(NULL, rctB, lpWindowName, 0, 0, 0, NULL);
m_dlgDialg.ShowWindow(SW_SHOW);
Thanks in advnace
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Hi.
I have a ATL inproc server that manages CWindowImpl derived window* internally.
The client need to get the internal window pointer, but I wanna return CWnd* instead ,because the client just need the basic windows behaviors of my control.
My control derived like this.
class CChartChildWnd : public CWindowImpl<cchartchildwnd,cwindow,ccontrolwintraits>,public CObject...
CChartChildWnd* pChartWnd = NULL; This is my actual control window.
and find the required window pointer.
if(!m_mapChartWnds->Lookup(strKey, (CObject*&)pChartWnd))
return E_FAIL;
VariantInit(varWnd);
varWnd->vt = VT_R4 | VT_BYREF;
And.. finally I need to set CWnd* as a return...
varWnd->byref = ?;
Thanks for..
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You can use CWnd::Attach(), but be sure not
to pass the CWnd between threads.
I would pass the HWND instead, shuffling around MFC
objects and they just end up biting you in the a** is my experience.
/Magnus
- I don't necessarily agree with everything I say
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I second Magnus' response. In fact, it's probably the only way to accomplish what you are trying to do. CWindow and CWnd is pure C++ and cannot reliably be passed between COM objects unless you're using local interfaces only. And judging by the use of variants, I suspect there may be other clients in your system not written in C++.
--
Gott weiß ich will kein Engel sein.
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I have a Browser Helper Object that contains code I want to execute after a user logs into my website and only after logging into my website. What is the best way to start the code execution?
I have thought of creating a hidden field named "start" on the web page and setting the field value to some unique string. Then searching for that field and testing the for the known value. Is there a cleaner solution.
Thank you in advance for your suggestions.
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Well, you could just hook the browser events (onload,ondocumentcomplete,ect..) and then check the current document location before doing whatever you need to do.
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Yes but if I did that my url would need to be hardcoded. I have a product that I will be marketing and as a result mey be host on a variety of web sites.
I guess I could create a hidden field and set the value to some string like: {2F94BC6A-9E91-4010-B991-EA0E22F9FED4}
and test for it. But I was hoping there would be a cleaner solution.
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Hello everyone:
How to add a help file into a wtl dialog?
Thank you.
-Freehawk
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I reinstalled Visual Studio. Now I am creating a ATL Dll using wizard. After compilation following error occurs.
<br />
fatal error C1083: Cannot open include file: 'ATLServer_i.c': No such file or directory
_i.c is not getting created. Is any settings required to do create _i.c.
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Have you add a COM object to your server properly?
Then try "Build All"
I am seeking...
For what?
Why did you ask me for what? I don't know!
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Hi all,
ATL question:
suppose I have two interfaces (IFirst, ISecond), and both
interfaces have a method Test(). Now I would like to implement
both IFirst and ISecond in a single object, but still have two
separate implementations of the Test() method.
Any pointers on how this can be done ?
Thanks,
Alwin
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Use rename when importing the typelib?
Only way i can think of...
/Magnus
- I don't necessarily agree with everything I say
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