Re: Accessing USB port - C / C++ / MFC Discussion Boards

skinnyreptile11-Jul-03 6:34

11-Jul-03 6:34

Is there anyway to verify a property page is created before I called RemovePage(), and is there anyway to insert a page (like between page 2 and 3)in the property pages? Thank you!

Re: Property Pages question

David Crow11-Jul-03 7:14

David Crow

11-Jul-03 7:14

skinnyreptile wrote:
Is there anyway to verify a property page is created before I called RemovePage(),

if (::IsWindow(m_pOptionsPage->m_hWnd) == TRUE)
RemovePage(GetPageIndex(m_pOptionsPage));

skinnyreptile wrote:
is there anyway to insert a page (like between page 2 and 3)in the property pages?

Not that I know of.

Open modeless Dialog from a DLL

Mathias S.11-Jul-03 6:09

Mathias S.

11-Jul-03 6:09

I want to open a modeless dialog from a DLL.
The DLL is a MFC DLL and contains a CWinApp

In the DLL this code is run to create the dialog

void CShowDlg::Show()
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());

	CMyDlg* pDlg = new CMyDlg();
	CMyDlg->Create( IDD_MYDLG , NULL );
	CMyDlg->ModifyStyleEx( 0 , WS_EX_APPWINDOW );
	CMyDlg->ShowWindow( SW_SHOW );
}

It Works. But the dialog is ALWAYS on top the main app. Since this dialog can be rater big it’s not good.

But if I comment out the creations of the CWinApp.

// CMyDlgDll theApp;

The dialog acts like any other window and can be sent to back and so.
But Then I get some other problem.

Some places in the code in the DLL is running CWaitCursor, and it is calling AfxGetApp();
Which returns NULL since theApp it out commented.

The only solution I found was to keep the CWinApp ( theApp ) and then create a new thread ( CWinThread ) and let that thread create the dialog.

Now everything works. But I got 2 extra thread just to open the dialog. And I think that one should be enough. or ?

Anyone have any ides/tips ?

Maximum Window size

pankajdaga11-Jul-03 6:03

pankajdaga

11-Jul-03 6:03

Hi everyone,

I have a question regarding window sizes. Is there a restriction to the maximum size a window can be? I have a custom control with child windows and a zooming control. I noticed that on large zooms, my window does not show the right size. I am guessing that after 2^15 pixels, it refuses to resize it anymore. Is that true and is there a way around it?

Thanks for any help you might give me.

Without struggle, there is no progress

Re: Maximum Window size

KaЯl11-Jul-03 12:30

KaЯl

11-Jul-03 12:30

The WM_SIZE message uses the lParam to store the width and the height of the window. Since lParam is 32-bit wide (typedef unsigned long DWORD;typedef DWORD LPARAM;), I suppose width and height shouldn't exceed 2^16-1 pixels.

We do not inherit the Earth from our ancestors, we borrow it from our children - Antoine de Saint-Exupéry (1900-1944)

Accessing USB port

Jonathan Gilligan11-Jul-03 6:02

Jonathan Gilligan

11-Jul-03 6:02

A friend has a USB device that he wants to support under Windows without dealing with the DDK and writing a device driver. The device is a data logger and he wants to talk to it in the same way he would if it were on an RS-232 port or a TCP/IP socket. He has working code for this on MacOSX using Apple's IOKit and on Linux using libusb. Is there an equivalent API for accessing a USB port in this way under Windows?

Re: Accessing USB port

valikac11-Jul-03 6:27

valikac

11-Jul-03 6:27

No. I believe a process must communicate to a USB device through its device driver.

Kuphryn

Re: Accessing USB port

Jonathan Gilligan11-Jul-03 6:40

Jonathan Gilligan

11-Jul-03 6:40

That's the sense I've gotten. I have a sense that the Windows model treats the USB bus like the PCI bus with no way to talk directly to devices.

Unfortunately, there's no device driver for this unit. My friend is writing an open-source support library for it and it's been trivial to support it under MacOSX and linux without writing a device driver. I guess windows just won't make it.

Adding toolbar to Visual C++ IDE

Anonymous11-Jul-03 6:02

Anonymous

11-Jul-03 6:02

I needed to add a tool entry in the Tools category where I need to

1 . Import certain files from a directory (SourceSafe) into my project
2 . Add an Import statement to my stdafx.h file

Is there some API method or MACRO to do this .
Please help

reverse inet_ntoa

RobJones11-Jul-03 5:25

RobJones

11-Jul-03 5:25

Hello,
This may seem like a weird question but I was wondering if we can produce the unsigned long from a dotted IP address? Basically the reverse of inet_ntoa.. it converts the unsigned long to a dotted ip address..

Any ideas?
Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Re: reverse inet_ntoa

Ryan Binns11-Jul-03 5:30

Ryan Binns

11-Jul-03 5:30

inet_addr() on Win32

inet_aton() or inet_pton() on Unix/Linux

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: reverse inet_ntoa

RobJones11-Jul-03 5:37

RobJones

11-Jul-03 5:37

That was too easy.. THANKS!

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Re: reverse inet_ntoa

Ryan Binns11-Jul-03 5:41

Ryan Binns

11-Jul-03 5:41

You're welcome Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

SSH

Brian Delahunty11-Jul-03 5:18

Brian Delahunty

11-Jul-03 5:18

Anybody know of any free C or C++ libraries that deal with SSH?

Regards,
Brian Dela Smile | :)

Re: SSH

Jonathan Gilligan11-Jul-03 6:41

Jonathan Gilligan

11-Jul-03 6:41

Try freessh.org and openssh.org.

Re: SSH

Brian Delahunty12-Jul-03 22:31

Brian Delahunty

12-Jul-03 22:31

Thanks

Regards,
Brian Dela Smile | :)

Screensaver install?

SIerus11-Jul-03 4:05

SIerus

11-Jul-03 4:05

I am creating an install program for my screensaver that I made. The problem I am having, is I want the windows screensaver dialog pop up, with MY screensaver set as the active one, displayed in front of me, like what happens when you right click on a screensaver to install. What do I do?

I looked for examples of screensavers on Code Project here, and I find screensaver source codes, but no install program source code.

I hope you know what I'm referring to, and I would appreciate any help. Smile | :)

Re: Screensaver install?

Ryan Binns11-Jul-03 4:42

Ryan Binns

11-Jul-03 4:42

Write to the registry: "HKEY_CURRENT_USER\Control Panel\Desktop" with the "SCRNSAVE.EXE" value name. This holds the path of your screensaver executable file.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Screensaver install?

SIerus11-Jul-03 4:50

SIerus

11-Jul-03 4:50

Does that cause the screensaver dialog box to pop up automatically?

Re: Screensaver install?

Ryan Binns11-Jul-03 4:55

Ryan Binns

11-Jul-03 4:55

No. To do that you need to use Rundll32.exe to run the "display.cpl" control panel application opened to the screensaver page (page 3, 0-indexed) Use this command line:

rundll32.exe shell32.dll,Control_RunDLL desk.cpl,,2

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Screensaver install?

SIerus11-Jul-03 4:59

SIerus

11-Jul-03 4:59

Awesome! Thank you so much. Smile | :)

Re: Screensaver install?

Ryan Binns11-Jul-03 5:01

Ryan Binns

11-Jul-03 5:01

You're welcome. Smile | :)

I will mention that that command line string has worked since Win95, but might show the wrong page. Just change the number at the end of the string to get the correct page Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Screensaver install?

Rage11-Jul-03 5:10

Rage

11-Jul-03 5:10

I'm very interested to know where you learned something like that ... That's not something one can discover by himself, is it ?

~RaGE();

Re: Screensaver install?

Ryan Binns11-Jul-03 5:14

Ryan Binns

11-Jul-03 5:14

MSDN has a heck of a lot of useful information Wink | ;)

You just gotta know where to look Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Screensaver install?

David Crow11-Jul-03 7:09

David Crow

11-Jul-03 7:09

And some words are not indexed. I've looked for things before that I knew should exist but couldn't find. Later on I'd be searching for something different and accidently stumble across what I was looking for earlier, and the word I was searching for would be right there staring at me. The MSDN search engine is very elusive at times.

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