C / C++ / MFC Discussion Boards

Re: garbage using CFileDialog

Tomasz Sowinski4-Jun-02 5:25

Tomasz Sowinski

4-Jun-02 5:25

You forgot to append two '|' characters at the end of the string

static char szFilter[] = "Executable Files (*.exe)|*.exe||";

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: garbage using CFileDialog

Luis E. Cuadrado5-Jun-02 1:25

Luis E. Cuadrado

5-Jun-02 1:25

Ooppsss, I didn't notice that. I put the two "||" and it works. Thank you very much Tomasz for all your help.

Have a nice day,

Luis E. Cuadrado
Blush | :O

)

is GDI+ able to display BIG bitmaps ?

jpg4-Jun-02 5:14

jpg

4-Jun-02 5:14

I use graphics.DrawImage to display a bitmap of 12000 * 8000 pixels (aerial photo).
It is painfully slow on a Pentium 700 Mhz with 512 MB.
But the real problem is : when I zoom on a portion of the bitmap (by setting the parameters of DrawImage to expand for example a portion of 500 * 500 pixels on the whole screen), DrawImage doesn't display anything and immediately returns a status OutOfMemory. Including virtual memory, more than 1 GB is available, but GDI+ doesn't seem to use it (no disk activity). It seems that GDI+ try to allocate memory as if it had to draw the whole bitmap with the same expansion factor, although I just want to display 500 * 500 pixels !
Is there a way to use GDI+ for REAL work ?

JPG

DX 8.1

Zizilamoroso4-Jun-02 4:53

Zizilamoroso

4-Jun-02 4:53

Anyone knows how the MultiFile Source Filter is replaced in DirectShow 8.1?

I want to merge 2 mediafiles together BEFORE they are decompressed. I've already done this a while ago, in an old dx version (possible 6), but exploring the dx8 docs returns nothing on multiple sources.

Is it left out, or is it replaced by something else (and perhaps better)?

Tnx...

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: DX 8.1

moredip4-Jun-02 5:42

moredip

4-Jun-02 5:42

If you are talking about compressed AVI then I believe you could use the AVI Mux on compressed streams.

I'm not sure about other media types.

HTH,

Pete

Re: DX 8.1

Zizilamoroso4-Jun-02 6:33

Zizilamoroso

4-Jun-02 6:33

That's not the problem.

If you add some sourcefilters to that mux, and write it to a file, you get 2 videowindows when trying to watch it. That's nice, 2 windows, but not what I need Smile | :)

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: DX 8.1

moredip4-Jun-02 7:23

moredip

4-Jun-02 7:23

afaik you have to manually build a graph.

For playback, open with file reader, connect to AVI Splitter, then chose the correct vid stream pin. connect that to a colour space converter(optional), then to a video renderer.

< LAME ASCII DIAGRAM >

         |  AVI   |---o wrong vid stream  
|FILE|-->|SPLITTER|---o--------------------->|CLR CoNV|--->|RENDERER|
         |        |---o wrong vid stream

</LAME ASCII DIAGRAM>

HTH,

Pete

Re: DX 8.1

Zizilamoroso4-Jun-02 23:06

Zizilamoroso

4-Jun-02 23:06

And what if the 2 clips have the same type, use the same filters? Can I disconnect the first filesource-filter after completion and connect another one to the same avi-splitter?

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: DX 8.1

moredip5-Jun-02 8:17

moredip

5-Jun-02 8:17

I'm confused. Are you talking about two streams in the same file, or two streams in two files (e.g. standard AVI)?

If you're talking about 1 stream per file, yes I believe you can disconnect then reconnect, but I think it's a bit involved. the microsoft.public.win32.programmer.directx.video newsgroup had a couple of threads about it a while ago, I suggest groups.google.com and searching that ng for "reconnect" or something.

If you are talking about 2 streams in 1 file, you would use 1 filesource and chose a pin from the avi splitter depending on which file you wanted.

HTH,

Pete

ADO question

4-Jun-02 4:39

I have noticed that most ADO examples including all MSDN examples use an import to import msado15.dll..

Although importing simplifies the task and gives much more easier to use methods, I was wondering whether this method is robust enough? is the ado dll available on all Windows operating system guaranteed to be msado15.dll or does the name change depending on the version?

Re: ADO question

Daniel Turini4-Jun-02 4:47

Daniel Turini

4-Jun-02 4:47

In fact, this is the stupid #import clause in VC 6.0 that needs a file and then gets its typelibrary and then gets th GUIDs. Is it robust ? Well, at runtime, yes, becase what's used is the typelibrary, but at compile time you can have problems, like the "Program Files" folder, in the Portuguese version of Windows is the "Arquivos de Programas"

Crivo
Automated Credit Assessment

Idea of How to Create Power Point looks like apps

DLeo4-Jun-02 4:43

DLeo

4-Jun-02 4:43

Hi, I want to get an idea on how to create the Slide that is similar to the Power Point.
I believe it uses the ole object for each slide. I am also looking for the solution on how to display the slide in full blown(Full Screen) like power point. Is there any particular API called? For the text fields in the Power point ( where you type the text for display) is that also the ole object? Please let me know. I have been looking for the solution to this feature for a while. If there is a good suggestion or code sample will be helpful. What I am trying to acomplish is to create an apps similar to Power Point. Instead of running the slide automatically or by pussing the down button, I try to let the user to have the whole control and they can jump and display from slide to slide by clicking just the slide. In other word the user insterface will be a slide like you see in the power point slide window.

Thanks for your help

DLEo

Re: Idea of How to Create Power Point looks like apps

Rage4-Jun-02 6:38

Rage

4-Jun-02 6:38

Displaying the slide in Full screen is not really hard. Just create a special window class without border and frames that displays full screen, and you got it. If you want a source code for this, just look the code for the screensaver app sample in the MSDN.

I do not know enough to help you on the other topics (BTW, it _IS_ possible to pass to next slide in Power Point just by clicking on it (I know some of my professor used to take their mouse to get a "remote controled Power Point" before the system which allows to do it through infrared begun to appear)).

~RaGE();

Process Handle given Process ID

mspitzer4-Jun-02 4:07

mspitzer

4-Jun-02 4:07

This may be something simple, but I can't seem to find it anywhere. Does anyone know of a way to get a handle to a process if I know the process ID? What I am trying to do is see if the process is still active by calling GetExitCodeProcess. I am getting the PID by enumerating the processes that are running at a certain time. Technically I could just run through all the running processes everytime I wanted to know if the process was running and compare PIDs, but that seems like overkill. It would be much simpler just to get the handle once, and check at anytime in the future using GetExitCodeProcess.

Thanks,
Mike

Re: Process Handle given Process ID

Daniel Turini4-Jun-02 4:49

Daniel Turini

4-Jun-02 4:49

Try
HANDLE OpenProcess(DWORD dwDesiredAccess, // access flag
BOOL bInheritHandle, // handle inheritance option
DWORD dwProcessId // process identifier
);

Crivo
Automated Credit Assessment

Re: Process Handle given Process ID

mspitzer4-Jun-02 5:03

mspitzer

4-Jun-02 5:03

Thanks. I don't know how I missed it. It was right in front of me the whole time. Having my 7 month old son (who is teething) Mad | :mad:

yelling in my ear probably had something to do with it.

Thanks again,
Mike

Is D: the CD-ROM?

Rickard Andersson²⁰4-Jun-02 4:01

Rickard Andersson²⁰

4-Jun-02 4:01

How can my app know that D: is my CD-ROM??

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C# and C++!

Re: Is D: the CD-ROM?

Mazdak4-Jun-02 4:07

Mazdak

4-Jun-02 4:07

Take a look at GetLogicalDriveStrings.

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Re: Is D: the CD-ROM?

Jason Henderson4-Jun-02 4:41

Jason Henderson

4-Jun-02 4:41

After getting the drives from GetLogicalDriveStrings, you need to use GetDriveType and test if the return value = DRIVE_CDROM.

Like it or not, I'm right.

Re: Is D: the CD-ROM?

Mazdak4-Jun-02 5:00

Mazdak

4-Jun-02 5:00

^Jason _Henderson wrote:
After getting the drives from GetLogicalDriveStrings, you need to use GetDriveType and test if the return value = DRIVE_CDROM.

Yes,you're right. Smile | :)

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Re: Is D: the CD-ROM?

Rickard Andersson²⁰4-Jun-02 5:59

Rickard Andersson²⁰

4-Jun-02 5:59

Aah!
That wasn't too much difficult! Smile | :)

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C# and C++!

Re: Is D: the CD-ROM?

Alexandru Savescu4-Jun-02 6:18

Alexandru Savescu

4-Jun-02 6:18

You can use GetVolumeInformation as an alternative!

Best regards,
Alexandru Savescu

linked Multi dialog based MFC app

edman4-Jun-02 3:45

edman

4-Jun-02 3:45

Hello,

I have to develop a dialog based MFC app in which several dialogs are linked using next/previous buttons, like in all those install apps.
As i dont have much time to do this, and as i havent used C++ in 3 years, i was wondering if a framework, or even some sample source code for such an app existed somewhere.

Thank you for your time. Smile | :)

Re: linked Multi dialog based MFC app

dazinith4-Jun-02 5:36

dazinith

4-Jun-02 5:36

you want to look at CPropertySheet and CPropertyPage..
basicly you use the resource editor to create dialogs, but instead of creating dialogs you create Property Pages (set to child instead of popup).. you create these for each of the pages you need.

then to put it all together you do:

CPropertySheet MySheet("This is my installer");
CMyPage1 page1;
CMyPage2 page2;
...
CMyPageN pageN;

MySheet.AddPage(&page1);
MySheet.AddPage(&page2);
...
MySheet.AddPage(&pageN);

MySheet.SetWizardMode();
MySheet.m_psh.dwFlags |= PSH_NOAPPLYNOW; // disables the 'apply' button
// display the form and wait for the finish button
if (MySheet.DoModal() == ID_WIZFINISH)
{ AfxMessageBox("woop!"); }

the CMyPage1,2,3 are the classes you created from your dialogs(proppages)

in your first page you need

BOOL CMyPage1::OnSetActive() 
{
   CPropertySheet* psheet = (CPropertySheet*) GetParent();   
   psheet->SetWizardButtons(PSWIZB_NEXT); // only have a next button on first page
   return CPropertyPage::OnSetActive();
}

in your middle pages you need

BOOL CMyPage2::OnSetActive() 
{
	CPropertySheet* psheet = (CPropertySheet*) GetParent();   
	psheet->SetWizardButtons(PSWIZB_BACK | PSWIZB_NEXT); // have next and back on middle pages
	return CPropertyPage::OnSetActive();
}

in your last page you need

BOOL CMyPageN::OnSetActive() 
{
	CPropertySheet* psheet = (CPropertySheet*) GetParent();   
	psheet->SetWizardButtons(PSWIZB_BACK | PSWIZB_FINISH); // have back and finish on last page
	return CPropertyPage::OnSetActive();
}

theres enough code to get you started.. if you can't get there from this then you prolly need to read a book or somethin.. there are examples on this stuff in the articles on here..

-dz

WM_GETTEXT

vikramlinux4-Jun-02 3:44

vikramlinux

4-Jun-02 3:44

hi For the EditBox with the style ES_PASSWORD, WM_GETTEXT works fine in case of win98 like versions. But in windows 2K it not works.can anybody explain me the reason?
Confused | :confused:

VIKS

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