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Hi All..
I need to use FFDShow interfaces in my VC++ project. how can i proceed. I got ffdshow.ax file from the FFDShow instalation directory. But there is no tlb file to import. Can i use this .ax file for getting the interfaces...? Or any other methods there to proceed...
Please help me...
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directshow filters normally doesn't have a typelib, because its not necessary for them to support IDispatch interface. Isn't it possible to get header files of ffdshow? How did you solve the problem?
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Still i am not able to fix the problem. For the time being i am using the FFDShow registry settings for my purpose. But this is not A PERMANENT SOLUTION for me...
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I have the following method to capture image from a window it works ok but today it save the same image to disk every times called. Please help me! I cannot understand what is the problem.
_______________________________________________
public void GetWindowPicture(IntPtr hWnd)
{
IntPtr hdcDest = default(IntPtr);
IntPtr hdcSrc = default(IntPtr);
RECT r = new RECT();
int w = 0;
int h = 0;
GetWindowRect(hWnd, ref r);
w = r.Right - r.Left;
h = r.Bottom - r.Top;
Bitmap bm = new Bitmap(w, h);
Graphics g = Graphics.FromImage(bm);
hdcSrc = GetWindowDC(hWnd);
hdcDest = g.GetHdc();
BitBlt(hdcDest, 0, 0, w, h, hdcSrc, 0, 0, SRCCOPY);
g.ReleaseHdc(hdcDest);
ReleaseDC(hWnd, hdcSrc);
bm.Save(GetOutputInfo(),System.Drawing.Imaging.ImageFormat.Jpeg);
}
_____________________________________
Thanks for your attention,
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This doesn't really look like a COM problem,...but, copying the same image every time is probably because the HWND is the same every time.
Give us some context as to where in an application this code is being executed.
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Hello All,
I tried to register simpleui5.ocx control in system32 from command prompt but not able to and i came across with the error LoadLibrary("c:\windows\system32\simpleui5.ocx") failed - invalid access memory location.
Can any buddy tell me how do i successfully register this active x control?
Best regards,
Ghaffar
I am an intermediate in this fantastic filed of science. I want to gain knowledge from profesionals of high caliber & Offcourse I want to share with other.
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Did u checked the registry whether this OCX is already registered.
if it is the, Unregister and register once more.
And check whether the same error is occuring?
Величие не Бога может быть недооценена.
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I am sorry my pool English.
I would like to filter the URL address by sink the IWebBrowser interface of current IE. first I get the current IE's IWebBrowser Interface, And the IConnectionPoint interface. but There is error when I connect with function "Advise".
this is my code:
// Get IE
BOOL EnumIE(HWND hWnd)
{
CoInitialize(NULL);
SHDocVw::IShellWindowsPtr spShWinds;
if (FAILED(spShWinds.CreateInstance(__uuidof(SHDocVw::ShellWindows))))
{
return FALSE;
}
long nCount = spShWinds->GetCount();
for (int n = 0; n < nCount; n++)
{
IDispatchPtr spDisp;
_variant_t var = (long)n;
spDisp = spShWinds->Item(var);
SHDocVw::IWebBrowser2Ptr spBrowser(spDisp);
if (spBrowser != NULL)
{
HWND hProcHwnd = NULL;
spBrowser->get_HWND((long*)&hProcHwnd);
if (hProcHwnd == hWnd)
{
ConnectIE(spBrowser); // connect the IE
}
}
}
return TRUE;
}
// connect current IE
void ConnectIE(IUnknown *pUnkSite) // 连接IE接口
{
HRESULT hr;
IWebBrowser2 *pSite; // the currently set site
if (pUnkSite)
pUnkSite->AddRef();
hr = pUnkSite->QueryInterface(IID_IWebBrowser2, (void**)&pSite);
pUnkSite->Release();
if (FAILED(hr))
return;
IConnectionPointContainer* pCPC;
IConnectionPoint *pCP;
hr = pSite->QueryInterface(IID_IConnectionPointContainer, (void**)&pCPC);
if (FAILED(hr))
return;
hr = pCPC->FindConnectionPoint(DIID_DWebBrowserEvents2,&pCP); // 得到连接点
if (FAILED(hr))
{
pCPC->Release();
return;
}
CComPtr<iunknown>> spUnk; //得到接受器接口
CSink theSink;
DWORD m_dwCookie;
theSink.QueryInterface(IID_IUnknown, (LPVOID *)&spUnk);
hr = pCP->Advise(spUnk, &m_dwCookie); // 建立连接 注意： 此处会失败。
// here will be fail. return hr = 0x80004000
if (FAILED(hr))
return;
}
this is my sink class:
// sink.h
class CSink: public IDispatch
{
public:
CSink();
virtual ~CSink();
// IUnknown
STDMETHOD(QueryInterface)(const struct _GUID &iid,void ** ppv);
ULONG __stdcall AddRef(void);
ULONG __stdcall Release(void);
// IDispatch
STDMETHOD(GetTypeInfoCount)(unsigned int *);
STDMETHOD(GetTypeInfo)(unsigned int,unsigned long,struct ITypeInfo ** );
STDMETHOD(GetIDsOfNames)(const struct _GUID &,unsigned short ** ,unsigned int,unsigned long,long *);
STDMETHOD(Invoke)(long dispID,const struct _GUID &,unsigned long,unsigned short,struct tagDISPPARAMS * pParams,struct tagVARIANT *,struct tagEXCEPINFO *,unsigned int *);
STDMETHODIMP SetSite(IUnknown *pUnkSite);
private:
DWORD m_dwCookie; // 连接的 cookie
};
// sink.cpp
CSink::CSink()
{
}
CSink::~CSink()
{
}
// STDMETHODIMP 是宏，等价于 long __stdcall
STDMETHODIMP CSink::QueryInterface(const struct _GUID &iid,void ** ppv)
{
*ppv=this;
return S_OK;
}
ULONG __stdcall CSink::AddRef(void)
{ return 1; }
ULONG __stdcall CSink::Release(void)
{ return 0; }
STDMETHODIMP CSink::GetTypeInfoCount(unsigned int *)
{ return E_NOTIMPL; }
STDMETHODIMP CSink::GetTypeInfo(unsigned int,unsigned long,struct ITypeInfo ** )
{ return E_NOTIMPL; }
STDMETHODIMP CSink::GetIDsOfNames(const struct _GUID &,unsigned short ** ,unsigned int,unsigned long,long *)
{ return E_NOTIMPL; }
STDMETHODIMP CSink::Invoke(
long dispID,
const struct _GUID &,
unsigned long,
unsigned short,
struct tagDISPPARAMS * pParams,
struct tagVARIANT *,
struct tagEXCEPINFO *,
unsigned int *)
{
switch(dispID)
{
case DISPID_BEFORENAVIGATE2:
MessageBox(NULL, "Filter", "HAHA", MB_OK);
break;
default:
break;
}
return S_OK;
}
Hope to get help, Thank you.
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Hi Guys,
I have 32-bit ocx which i am trying to register using regsvr32 command on 64-bit vista operating system. I am getting the message that registration is successful but later when i am launching my application , exe fails to load the OCX.
Can anybody knows how to solve this problem?
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Is your application 64bit?
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Could someone point me in the direction of any information on how to do error handling using HRESULT?
I'm not sure about OR-ing values with masks and I don't quite understand bit-wise operations on HRESULT data types.
I read things like "C" is left empty for Microsoft errors but set to a value for user defined errors. How exactly do I set a value to the 0x20000000th bit of a HRESULT data type value?
Any help greatly appreciated.
Almost, but not quite, entirely unlike... me...
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Firstly note that there are multiple success and failure code. If you're only interested in failure or success (and not the type of failure or success) then you can use the FAILED and SUCCEEDED macros:
HRESULT hr = pObj->SomeMethod();
if (FAILED(hr))
{
}
if (SUCCEEDED(hr))
{
}
A HRESULT is made from a number of components. The easiest way to create one from its component parts is with the MAKE_HRESULT[^] macro.
To make a user defined error code to be returned from a COM interface you'd do something like this (MS recommends error values in the range 0x0200 to 0xffff):
MAKE_HRESULT(SEVERITY_ERROR, FACILITY_ITF, 0x200)
The structure of a HRESULT is shown here[^].
Some more information is here[^].
Steve
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HRESULT handling depends from which operation it comes. You got to really readly completly the docs and and understand it like a lawyer. 
Press F1 for help or google it.
Greetings from Germany
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Hello All,
I am very new to com and reading it from Internet.
I was making Exe server and client (both are exe). I able to do that also in Visual studio 2008. If I call class function of exe server from client i am able to do it also.
NOW My Problem is ,
<pre>STDMETHODIMP CDcomClass::GetIntVal(LONG* val)
{
LONG i=105;
*val=i;
printf("\n HI I am from Exe Server \n");
Beep(800,800);return S_OK;
}
In this code I get val in client ,Beep() also run,but printf("\n HI....
is not executed .
Can You please explain me reason.
Thank you.
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Exe server is an out proc server. So, your client cannot see what is printed by the server exe.
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Thanks ,But I want to show this msg to server what should I do
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May be you can check if a log file would work for you.
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If you want to print then change the signature of the function and out parameter as BSTR.
Величие не Бога может быть недооценена.
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I want to connect to the sql server database and do some query command via ado. I use this connection string to do that work:"Provider=SQLOLEDB;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=DaDian2008;Data Source=localhost;UID=sa;PWD=123456;Network Library=dbmssocn", it works well. But how about with a remote server(LAN). For example, my ip address is 192.168.1.100, i just replace localhost to 192.168.1.100, it would get an exception says:
Code = 80004005
Code meaning = Unspecified error
Source = Microsoft OLE DB Provider for SQL Server
Description = [DBNETLIB][ConnectionOpen (Connect()).]Specified SQL server not found.
Why? And how can i connect to a remote sql server(MS SQL Server within LAN)?
btw, if I use "Driver={SQL Server};Server=192.168.1.100;Address=192.168.1.100,1433;Network=DBMSSOCN;User ID=sa;PWD=123456;Database=DaDian2008; Then, I can connect to the database on my locale computer, but it would fail again on another computer.
modified on Sunday, March 21, 2010 9:16 AM
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Make sure you can connect with odbcad32.exe before trying your code. Then visit connectionstrings.com for help.
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Hi,
I'm marshalling some data in a timerproc thread using the GetInterfaceFromGlobal and Release function. However I noticed there is a high cpu usage when calling this function multiple times. Any ideas why this is happening?
Thanks
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Hello,
Here is my need,
For each Release, I need to delete some COM+ Components for an Application and install some newer version of the same.
Till day it is accomplished through COM+ Window, I go to Component Services+Computers+COM+ Applications+'Application'+Components and select the components and delete them. Once deleted right click on components and select New->Component and then browse to the new version of dll which install back the components.
I tried to accomplish it through Regcomplus.exe. Issue is, it installs new components but it deletes all existing components under the application leaving just the new ones.
Command executed is "RegComPlus.exe <dll file> <application name>"
Any help on this would be greatly appreciated.
Thanks,
Simon Mandy
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I have made a right-click drag-and-drop shell extension to copy specific project files. It's all working very well at copying files, but it freezes all instances of explorer.exe while it's doing its thing on bigger projects. A colleague told me to put sleep() somewhere in the copying function. I find this approach inelegant and possibly ineffective. There must be a way to make this more user- and thread-friendly. There was also talk of progress bars, but just one thing at a time...
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| I want to get the already open excel sheet and get the cell value using IDispatch. Trioum
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