Re: Need help with NewWindow3 and IWebBrowse2 - C / C++ / MFC Discussion Boards

Re: Need help with NewWindow3 and IWebBrowse2

David Crow9-Aug-06 7:11

9-Aug-06 7:11

univega_r304 wrote:
void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR *Flags, BSTR *URLContext, BSTR *URL)

I made an error. The last three parameters are indeed pass-by-value, not pass-by-reference. You can remove the '*' from them.

You should be able to set a breakpoint on the first statement in OnNewWindow3Explorer1() and see the value of URL. If it's not correct then, nor shall it be when assigned to url.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 7:26

Paul Groetzner

9-Aug-06 7:26

Ok, I set it back to pass-by-value (I caught your earlier post you had deleted)

I set up a breakpoint on the line: url = vnt.bstrVal; and it shows me the URL! But why then is it displaying in AfxMessageBox as all ? marks.... hmmmm....

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 7:32

Paul Groetzner

9-Aug-06 7:32

This is what I see in the debugger (Autos tab):

url tree ->

Name: url
Value: {...}
Type: ATL::CStringT<char,strtraitmfc<char,atl::chtraitscrt<char> > >

Name: ATL::CSimpleStringT<char,0>
Value: "*edited value* http://myinternallink"
Type: ATL::CSimpleStringT<char,0>

Name: m_pszData
Value: 0x6aed22a7 <bad ptr="">
Type: char *

Name: <warning symbol="">
Value: CXX0030: Error: expression cannot be evaluated

Re: Need help with NewWindow3 and IWebBrowse2

David Crow9-Aug-06 8:20

David Crow

9-Aug-06 8:20

None of the vnt stuff is necessary. Just use:

CString url(V_BSTR(&URL));
AfxMessageBox(url);

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 8:31

Paul Groetzner

9-Aug-06 8:31

That didn't work. The compiler didn't like it one bit Frown | :(

error C2227: left of '->bstrVal' must point to class/struct/union/generic type
type is 'BSTR *'

Re: Need help with NewWindow3 and IWebBrowse2

David Crow9-Aug-06 8:41

David Crow

9-Aug-06 8:41

Show me your code once more. Did you try it with/out the ampersand?

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 9:04

Paul Groetzner

9-Aug-06 9:04

Tried it with and without the ampersand. Pretty much the same error:

with:
error C2227: left of '->bstrVal' must point to class/struct/union/generic type
type is 'BSTR *'

without:
error C2227: left of '->bstrVal' must point to class/struct/union/generic type
type is 'BSTR'

Here's my code:

ON_EVENT(CLoadWebSite, IDC_EXPLORER, 273 /* NewWindow3 */, OnNewWindow3Explorer1, VTS_DISPATCH VTS_PBOOL VTS_BSTR VTS_BSTR VTS_BSTR)

void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL)
{
CString url(V_BSTR(URL));
AfxMessageBox(url);

*Cancel = TRUE;

// Browser.Navigate(url,NULL,NULL,NULL,NULL);
}

Re: Need help with NewWindow3 and IWebBrowse2

David Crow9-Aug-06 9:57

David Crow

9-Aug-06 9:57

I messed up (again). Blush | :O

Since URL is already a BSTR, as opposed to a VARIANT, it obviously cannot be run through the V_BSTR() macro.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 10:29

Paul Groetzner

9-Aug-06 10:29

I've tried converting the value to CString every which way and it always comes to the same results no matter what, a line of several dozen ? marks.

This is getting quite frustrating Cry | :((

I have to assume then that it may be a problem with BSTR URL not reporting a proper url.

To test the NewWindow3 function I had my default site go to google.com, I searched on a something irrelevant and right-clicked to Open to a new window to trigger the event. In the debugger URL always comes back as a bunch of square shapes (I think because debugger can't display BSTR?, at least there's a doc somewhere on codeproject that said it couldn't, but it might have been for an older version of VS) and converting always results in ? marks...

If you want to test this you can do do very easily by going to this link:
http://www.codeproject.com/com/webbrowser.asp[^]

This is basically something similar to what I have. Just edit the code, change the default site if you wish and add the event for the NewWindow3 compile and have at it to see what you can find...

Re: Need help with NewWindow3 and IWebBrowse2

David Crow9-Aug-06 11:16

David Crow

9-Aug-06 11:16

univega_r304 wrote:
I think because debugger can't display BSTR

It might indeed be a Unicode thing. This is the default for VS2003 and VS2005, but not so with VS6 (what I'm using).

In the Watch window, the symbol for strings is s while the symbol for Unicode strings is su. See here for more.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner9-Aug-06 17:57

Paul Groetzner

9-Aug-06 17:57

Yeah, I'm using VS2005...

Here's a new bit a code that came very close...

void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL)
{
BSTR b = URL;
_bstr_t orig(b);
CString cstring((char *)orig);
AfxMessageBox(_T(cstring));

*Cancel = TRUE;

Browser.Navigate(cstring,NULL,NULL,NULL,NULL);
}

When I debug this code the value for cstring is the URL I need! However, when I try to view it with AfxMessageBox or Navigate to it, it still thinks the value is all question marks.... I don't understand why it could show me one thing and do another... I wish there was a way to post a screenshot....

Any ideas?

Re: Need help with NewWindow3 and IWebBrowse2

David Crow10-Aug-06 3:30

David Crow

10-Aug-06 3:30

univega_r304 wrote:
AfxMessageBox(_T(cstring));

The _T() macro is for string literals.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

David Crow10-Aug-06 5:09

David Crow

10-Aug-06 5:09

univega_r304 wrote:

If you want to test this you can do do very easily by going to this link:
http://www.codeproject.com/com/webbrowser.asp[^]

This is basically something similar to what I have. Just edit the code, change the default site if you wish and add the event for the NewWindow3 compile and have at it to see what you can find...

I already had an application that uses this control, but for some reason it does not support the NewWindow3 event. What version of shdocvw.dll do you have? Mine is 6.0.2900.2937.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner10-Aug-06 19:22

Paul Groetzner

10-Aug-06 19:22

Unless it's on mulitple locations on my drive the version I have appears to be older... I have 6.0.2900.2919. According to the article on MSDN: NewWindow3 is available only in Microsoft Windows XP Service Pack 2 (SP2) or later. So if you have that, it should work...

FYI, after messing around a bit and not getting anywhere I put the code back that was showing me the proper URL in the debugger stopped working again. Same code, but bad results. I have't been able to get it to reproduce the proper URL in the debugger since. Mad | :mad:

Re: Need help with NewWindow3 and IWebBrowse2

Paul Groetzner11-Aug-06 9:17

Paul Groetzner

11-Aug-06 9:17

Would you believe I *FINALLY* got it working?

Here's the code to make it work....

ON_EVENT(CLoadWebSite, IDC_EXPLORER, 273 /* NewWindow3 */, OnNewWindow3Explorer1, VTS_DISPATCH VTS_PBOOL VTS_BSTR VTS_BSTR VTS_BSTR)

void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL)
{
CString strURL;

// capture URL of any link clicked that would attempt to open in a new window
if (URL != NULL)
strURL = (LPCTSTR)URL;

*Cancel = TRUE; // prevent IE from spawning

Browser.Navigate(strURL,NULL,NULL,NULL,NULL); // loads resulting URL into the web browser control instead of a spawned IE window
}

Re: Need help with NewWindow3 and IWebBrowse2

David Crow11-Aug-06 9:25

David Crow

11-Aug-06 9:25

univega_r304 wrote:
strURL = (LPCTSTR)URL;

This makes sense since a BSTR is really a type of char*. Could you have also done:

strURL = URL;

as the assignment operator should handle the typecast automatically? If not, oh well.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Cursor clipped via ClipCursor goes away after right click

rajandpayal9-Aug-06 4:58

rajandpayal

9-Aug-06 4:58

Have a look at following code :

-----------------------------------------------------------------------------------------------------------------------
#include <afx.h>
#include <afxwin.h>
#include <conio.h>
#include <iostream>

using namespace std;

int main( int, char* [] )
{
CRect rc( 100,100, 500, 500 );
CRect rcOld;

CPoint pt;
GetCursorPos(&pt);
cout << "Current Position " << pt.x << ", " << pt.y << endl;
GetClipCursor(&rcOld);

ClipCursor( &rc );

cout << "Press any key to restore.." << endl;
getch();

ClipCursor( &rcOld );

return 0;
}
-----------------------------------------------------------------------------------------------------------------------

Looks foolproof.

Just build and run this application.
You will find that cursor indeed gets clipped in the area specified.

But, just do a right click and all clipping goes away !!!!

How can I resolve this? I dont want the clipped rect to go away till I restore the original rectangle back...

Re: Cursor clipped via ClipCursor goes away after right click

Michael Dunn9-Aug-06 9:36

Michael Dunn

9-Aug-06 9:36

This is the correct behavior. The cursor is a shared system resource, no one app is allowed total control over it. Imagine if ClipCursor() worked 100% of the time. All you'd have to do was write an app that calls ClipCursor(0,0,1,1) and boom - instant denial of service.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Heap allocation from SDRAM

Toni789-Aug-06 4:21

Toni78

9-Aug-06 4:21

I know that this question is not really related to Visual C++ but hopefully there will be someone here who has experience in real-time programming.

I'd like to allocate memory using malloc( ) function which allocates it on the internal SRAM. Does anyone know how I could do dynamic memory allocation on the SDRAM?

Time is the fire in which we burn.

Re: Heap allocation from SDRAM

toxcct9-Aug-06 4:34

toxcct

9-Aug-06 4:34

where else do you think you can dynamically allocate some memory ?

use malloc(), it will do the job for you, unless you use C++, then, use new instead.

but never forget : when you dynamically allocate some memory, you have to free it yourself, otherwise you'll get into memory leaks hell...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Heap allocation from SDRAM [modified]

9ine9-Aug-06 5:10

9ine

9-Aug-06 5:10

ohhhhh! nice memory leaks Smile | :)

never clean it after yourself!

is in C++ 'new' is a stub to call 'malloc'. by the way malloc is much faster than 'new' when called several hundred times.

9ine

Re: Heap allocation from SDRAM

toxcct9-Aug-06 5:16

toxcct

9-Aug-06 5:16

9ine wrote:
by the way malloc is much faster than 'new' when called several hundred times

but non reentrant... so, bad !

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Heap allocation from SDRAM

Toni789-Aug-06 5:12

Toni78

9-Aug-06 5:12

toxcct wrote:
where else do you think you can dynamically allocate some memory ?

In multiple heap scenarios you can define your own memory segments to specify which area of memory is used to allocate various elements such as messages, semaphores etc. I have a feeling that this is processor dependend and not something that I can do with C standard functions. Is there a way of doing this without depending on the platform being used? I realize that my previous question is not clear enough and I apologize for that. I must stress that this is a Real-Time programming related question.

Time is the fire in which we burn.

Re: Heap allocation from SDRAM

Rick York9-Aug-06 6:59

Rick York

9-Aug-06 6:59

That is platform dependent.

Re: Heap allocation from SDRAM

Zac Howland9-Aug-06 5:26

Zac Howland

9-Aug-06 5:26

toxcct wrote:
where else do you think you can dynamically allocate some memory ?

In real-time/embedded systems, where you allocate memory is often just as important as the memory you actually allocate. I believe the OP is asking how he can allocate memory in SDRAM instead of SRAM.

I think that is system dependent. I'm trying to remember my VxWorks stuff (haven't used it in a while) ... but I think you have to make a OS API call to allocate memory outside the default heap.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.