C / C++ / MFC

Re: Auto Saving of Clipboard image as Jpeg file

Code-o-mat25-Apr-10 22:46

Code-o-mat

25-Apr-10 22:46

How do you play the video? If you are using DirectShow then you can add a samplegrabber filter to the filter graph to grab frames from the stream as bitmaps, you can then use GDI+ or somesuch to save the bitmaps as JPEG to wherever you wish. Am not sure if you are able to "overdefine" the Print-Screen button but i would try to define a hotkey for it in my application.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

_bstr_t to std::string

gmallax25-Apr-10 20:39

gmallax

25-Apr-10 20:39

Hi,

how to convert from _bstr_t to std::string data type?

Thanx

Re: _bstr_t to std::string

Stuart Dootson25-Apr-10 20:47

Stuart Dootson

25-Apr-10 20:47

Use _bstr_t's char* extraction operator:

_bstr_t bStr(L"Hello");
std::string str((char*)bStr);

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: _bstr_t to std::string

gmallax25-Apr-10 20:59

gmallax

25-Apr-10 20:59

yes.Thanx

Re: _bstr_t to std::string

Nemanja Trifunovic26-Apr-10 5:14

Nemanja Trifunovic

26-Apr-10 5:14

Stuart Dootson wrote:
Use _bstr_t's char* extraction operator:

Haven't used _bstr_t at all, but from the documentation I would say the extraction operator merely gives a pointer to the internal data buffer. That's most probably not what he needs. He should convert the UTF-16 encoded _bstr_t string to some multibyte encoding first to store it to std::string.

utf8-cpp

Re: _bstr_t to std::string

Stuart Dootson26-Apr-10 6:14

Stuart Dootson

26-Apr-10 6:14

_bstr_t keeps an internal ASCII copy of the BSTR which is populated on demand. This copy is the internal data buffer that the char* extractor returns a pointer to. Therefore the answer I gave is what the OP needs and wants.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: _bstr_t to std::string

Nemanja Trifunovic26-Apr-10 6:44

Nemanja Trifunovic

26-Apr-10 6:44

Stuart Dootson wrote:
_bstr_t keeps an internal ASCII copy of the BSTR which is populated on demand

Interesting. Is it really ASCII, or whatever the system code page is ("ANSI")?

utf8-cpp

Re: _bstr_t to std::string

Stuart Dootson26-Apr-10 7:23

Stuart Dootson

26-Apr-10 7:23

No idea - didn't look quite that far into the source (comutil.h in your VS distribution, if you want to look).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

how to pass Cstring to vb dll fuction in vc++

Member 365375125-Apr-10 20:28

Member 3653751

25-Apr-10 20:28

hi friend,

i have vb dll..in the vb dll one fuction f1;

Public Function f1(SendString As String) As String - this function taking as argument and return string...

how i will call in vc++;

CoInitialize(NULL);

hresult=CLSIDFromProgID(OLESTR("prjdll.clsdll"), &clsid);

_clsdll *t;
hresult=CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,__uuidof(_clsdll),(LPVOID *) &t);

CString str= "000001";

t->f1(str); // this is crasing....

please help any body.

Re: how to pass Cstring to vb dll fuction in vc++

Stuart Dootson25-Apr-10 20:55

Stuart Dootson

25-Apr-10 20:55

You need to pass this as a BSTR (or possibly a BSTR encapsulated in a VARIANT). Open the VB DLL in the OLE/COM Object Viewer (use the File->View TypeLib... command) to see what parameter type the VB DLL is expecting to see for this call.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: how to pass Cstring to vb dll fuction in vc++

CPallini25-Apr-10 20:58

CPallini

25-Apr-10 20:58

You cannot pass a CString's instance, you've to pass a BSTR.
Anyway, the

Member 3653751 wrote:
t->f1(str);

call seems wrong (what is _clsdll type?)
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

OnInitialUpdate in FormView

hellogany25-Apr-10 18:34

hellogany

25-Apr-10 18:34

Hi

I m developin an application with treeview on left side and formview on right side(Splitterwnd).

Whenevr a user cliks an itme in treeview a form window will appear on right side.

My Problem is that OnInitialUpdate Fn is not working in the formview...

Due to this i face a problem of using the list control in the application..

But in different project of normal SDi, the Initial Update Funtion works fine..

Can Any One Suggest me a Solution?

FFMPEG on Visual studio 2008

Game-point25-Apr-10 18:04

Game-point

25-Apr-10 18:04

Hello Sirs

Is it possible to convert FFMEPG on Visual Studio ?

thanks
raju

Failure is Success If we learn from it!!

Re: FFMPEG on Visual studio 2008

Saurabh.Garg25-Apr-10 19:47

Saurabh.Garg

25-Apr-10 19:47

No it is not possible. See here[^] and here[^].

-Saurabh

Re: FFMPEG on Visual studio 2008

Saurabh.Garg25-Apr-10 19:47

Saurabh.Garg

25-Apr-10 19:47

Note that it is still possible to use FFMPEG from visual studio.
Using FFMpeg in Microsoft Visual C++ Environment[^].

-Saurabh

Why me program in ras for WinCE is return Error and Exit Thread?

patrick15525-Apr-10 17:51

patrick155

25-Apr-10 17:51

RASDIALPARAMS lpRasDialParams;<br />
ZeroMemory(&lpRasDialParams,sizeof(lpRasDialParams));<br />
wcscpy(lpRasDialParams.szEntryName, TEXT("我的连接"));<br />
lpRasDialParams.dwSize = sizeof(lpRasDialParams);<br />
BOOL lpBool = TRUE;<br />
DWORD dwReturn = 0;<br />
<br />
dwReturn = ::RasGetEntryDialParams(NULL, &lpRasDialParams, &lpBool);

dwRetrun value is 1168 ? what is this?

Re: Why me program in ras for WinCE is return Error and Exit Thread?

Stuart Dootson25-Apr-10 20:40

Stuart Dootson

25-Apr-10 20:40

Try looking at the documentation for the function[^]. That points you at either the RAS specific errors or winerror.h. In winerror.h, you'll find this:

//
// MessageId: ERROR_NOT_FOUND
//
// MessageText:
//
//  Element not found.
//
#define ERROR_NOT_FOUND                  1168L

which I suspect means your entry name is unknown.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: Why me program in ras for WinCE is return Error and Exit Thread?

patrick15525-Apr-10 20:46

patrick155

25-Apr-10 20:46

yes, i seee it.

but entry name is right, the name is same of ras connect name

Re: Why me program in ras for WinCE is return Error and Exit Thread?

patrick15525-Apr-10 20:47

patrick155

25-Apr-10 20:47

thanks your ans.

long long with swprintf / Win32

Fareed Rizkalla25-Apr-10 8:35

Fareed Rizkalla

25-Apr-10 8:35

I'm using a long long variable with swprintf, however swprintf is unable to understand long long and returning zero.

wchar_t[20];
long long var = 500000;
swprintf(t, L"%i", var);
MessageBox(NULL, t, L"Output", NULL);

tried %i and %d
any advice for work fix solution or a work around! i would be very thankful.

Re: long long with swprintf / Win32 [modified]

Michel Godfroid25-Apr-10 8:51

Michel Godfroid

25-Apr-10 8:51

try %lld, that's what most C runtimes use, I don't see it in the MS doco, but it might just work...

modified on Sunday, April 25, 2010 2:59 PM

Re: long long with swprintf / Win32

C^hris L^osinger25-Apr-10 9:08

C^hris L^osinger

25-Apr-10 9:08

"%I64d" should do it

image processing toolkits | batch image processing

Re: long long with swprintf / Win32

Michel Godfroid25-Apr-10 10:13

Michel Godfroid

25-Apr-10 10:13

Not portable, "I64" formats a _int64, while "ll" formats a long long, which is AT LEAST 64 bits long. Haven't yet met a platform where they differ though Smile | :)