C / C++ / MFC

Re: how to compress data using zlib?

24-Jan-13 2:45

Start here[^], and study the documentation.

Albert Holguin25-Jan-13 8:51

Albert Holguin

25-Jan-13 8:51

This question is both vague and applicable to that very specific library. Why don't you read the manual and come back with more specific questions?

Debugging Dll

sarfaraznawaz24-Jan-13 1:30

24-Jan-13 1:30

hi every one ...
i have written com dll i want to debug the dll i dont how to do it .

please reply

Best Regards
sarfaraz

Debugging Dll

sarfaraznawaz24-Jan-13 1:30

24-Jan-13 1:30

hi every one ...
i have written com dll i want to debug the dll i dont how to do it .

please reply

Best Regards
sarfaraz

Sivaraman Dhamodharan24-Jan-13 2:26

Sivaraman Dhamodharan

24-Jan-13 2:26

1) Write a exe program that uses your COM.
2) Launch the exe.
3) Open your COM Project is Visual Studio
4) Attach the already running exe with the Project.
5) Keep the break points and start debugging it.

Programming Article

sarfaraznawaz24-Jan-13 3:58

24-Jan-13 3:58

see am not able to understand the 4th step.
attach in the sense by changing the configuration properties in that debugging and then
command and passing the path of the exe. if this the way then its control not coming to break point or i may be wrong to the exe ....

Best Regards
Sarfaraz

Richard MacCutchan24-Jan-13 4:16

24-Jan-13 4:16

You can debug your code by loading the DLL directly into your application rather than using it in registered mode: see the CoLoadLibrary function[^].

sarfaraznawaz30-Jan-13 2:25

30-Jan-13 2:25

hi ,thanks ...
one more thing i want to ask how to register the dll .
am getting the error message that DLL has loaded but entry point DllRegisterserver was not found ...
but am wtritten the code for it

C++

AFX_MANAGE_STATE(AfxGetStaticModuleState( ));

	HRESULT hr = RegisterServer (AfxGetInstanceHandle(),   // handle to dll module
	                             CLSID_CCmpnt,	      // component CLSID
				     g_szFriendlyName,	      // friendly name
				     g_szVerIndProgID,	      // version independent prog id
				     g_szVerDndProgID);		// version dependent prog id

	

	return hr;

its in a function name STDAPI DllRegisterServer(void)
the control not coming in this function what might be cause please reply

Best Regards
Sarfaraz

Richard MacCutchan30-Jan-13 3:55

30-Jan-13 3:55

I don't see any declaration of DllRegisterServer()[^] in the above.

sarfaraznawaz30-Jan-13 4:10

30-Jan-13 4:10

STDAPI DllRegisterServer(void) this i used
in this only i written the code

Richard MacCutchan30-Jan-13 4:20

30-Jan-13 4:20

Used where? Please show the actual declaration. Also make sure that you are exporting this correctly in your build.

sarfaraznawaz31-Jan-13 0:06

31-Jan-13 0:06

hi thanks again now its getting register. i was not exporting correctly ..

The dll i wrote for the context menu this is done in 32 bit machine but in 64 bit machine the context menu is not coming ...
what might be the problem

Richard MacCutchan31-Jan-13 0:10

31-Jan-13 0:10

sarfaraznawaz wrote:
the context menu is not coming ...

what might be the problem

Any one of a million things. As I just said to someone else in these forums, you need to give specific details, don't expect people to be able to guess what is happening in your code.

sarfaraznawaz31-Jan-13 3:01

31-Jan-13 3:01

ok sorry ..
the code i build in 32 bit its success but when i configure the VS 2010 for 64 bit the error message con not instantiate the
HRESULT IContextMenu::GetCommandString(UINT_PTR,UINT,UINT *,LPSTR,UINT)' : is abstract
see declaration of 'IContextMenu::GetCommandString'
why this conflict

Richard MacCutchan31-Jan-13 3:04

31-Jan-13 3:04

No idea, once again there is not enough information for me to guess.

sarfaraznawaz31-Jan-13 3:21

31-Jan-13 3:21

In DLL i have written the code for Context menu in vs2010 using COM
i derived the class CRsEraser : public IContextMenu, public IShellExtInit
this IShellExtInit and IContextMenu is are com class
when use it

HRESULT __stdcall CCmpntFactory::CreateInstance (IUnknown *pUnknownOuter, const IID& iid, void** ppv)
{
if(pUnknownOuter != NULL)
return CLASS_E_NOAGGREGATION;

CRsEraser *pCmpnt = new CRsEraser;
if (pCmpnt == NULL)
return E_OUTOFMEMORY;

HRESULT hr = pCmpnt->QueryInterface (iid, ppv);

//////////////////////////////////////////////////////////////////////////
// Release the IUnknown pointer
pCmpnt->Release ();

return hr;
}
CRsEraser *pCmpnt = new CRsEraser;this part showing its abstract class .
in 32 bit compile its working fine same when configure to 64 bit its throwing the error what i have mention earlier .
how i configure:
1 Open your Visual C++ Solution
2 Choose Build->Configuration Manager menu
3 Inside the Configuration Manager window, change the ‘Active solution platform’ to x64. If you don’t have any, you would need to create one by selecting the ‘New..’ drop down item. Copy settings from your Win32 platform.
4 Now rebuild your solution.

sarfaraznawaz5-Feb-13 19:21