C / C++ / MFC Discussion Boards

Extract path

Manish Wadhera7-Jul-02 17:37

Manish Wadhera

7-Jul-02 17:37

How can i extract the path "C:\Mine\VC\" from the complete path "C:\Mine\VC\abc.exe" and store it in a variable.

Re: Extract path

Rama Krishna Vavilala7-Jul-02 17:45

Rama Krishna Vavilala

7-Jul-02 17:45

If you are using VC7 there is a class called ATLPath which you can use. Otherwise you can do something along these lines

TCHAR szPath[] = "C:\\Mine\\VC\\abc.exe";
TCHAR szDir[_MAX_PATH];

StrNCpy(szDir, szPath, PathGetFileName(szPath) - &szPath[0] - 1);

There are lot of Pathxxx functions in Shlwapi.h.

Re: Extract path

Shog⁹7-Jul-02 17:48

Shog⁹

7-Jul-02 17:48

Using MFC:

CString strPathAndName = "C:\Mine\VC\abc.exe";
int nSlashLoc = strPathAndName.ReverseFind('\\');
CString strPath = strPathAndName.Left(nSlashLoc);

- Shog9 -

Aaah... It's time to relax. You know what that means: a glass of beer, your favorite ergo chair... And of course, The Code Project loaded on your Personal Computer System. So go on, and indulge yourself, put your feet up. Lean back and just enjoy the articles. After all, CP sooths even the savage Green Alien | [Alien]

Re: Extract path

PJ Arends7-Jul-02 20:44

PJ Arends

7-Jul-02 20:44

_splitpath()

---
CPUA 0x5041

Sonork 100.11743 Chicken Little

Within you lies the power for good - Use it!

Check for Active VPN connection

7-Jul-02 15:12

I want my application to check for an active VPN connection.
Any ideas?

Thanks

A reasonable man adapts himself to the world. An unreasonable one persists, trying to adapt the world to himself. That is why all the progress in the world depends on the unreasonable men.

atlconv.h

RK_20007-Jul-02 13:24

RK_2000

7-Jul-02 13:24

I am trying to build a project and I have included atlconv.h so I can do atl conversions between ansi and unicode.

My application is not using MFC BTW. I am getting the following error:

c:\program files\microsoft visual studio\vc98\atl\include\atlconv.h(48) : error C2065: '_ASSERTE' : undeclared identifier

Any ideas what the problem maybe?

thanks

Re: atlconv.h

Christian Graus7-Jul-02 13:25

Christian Graus

7-Jul-02 13:25

You need to include comutils.h instead and use _bstr_t to do your conversions.

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Re: atlconv.h

RK_20007-Jul-02 13:30

RK_2000

7-Jul-02 13:30

actually sorry I had forgotten atlbase.h along the path.

thanks

combo question

bryce7-Jul-02 13:20

bryce

7-Jul-02 13:20

hi
can one display on the the editbox part of a ccombo and not the dropdown arrow?
(want to show the edit part until certain conditions are met then show the dropdown etc)

cheers
Bryce

Re: combo question

sagmam8-Jul-02 5:57

sagmam

8-Jul-02 5:57

I need some more details, but the most common context I assume you're talking about is how to correctly use the SetItemHeight method of CComboBox. Notice that if you use SetItemHeight( -1, .... ), where -1 is the index of the editbox, then you can set the size of the editbox, thus making it show...

/=/=/=/=
Deus
/=/=/=/=

Re: combo question

bryce8-Jul-02 12:39

bryce

8-Jul-02 12:39

umm i want to have the ccombobox, but i don't want to show the dropdown arrow on the right hand side
unless the user double clicks the control Smile | :)

Bryce

Re: combo question

sagmam8-Jul-02 21:21

sagmam

8-Jul-02 21:21

Very strange behavior if I may say so... Let me get this straight:
You have a control that looks like a regular editbox. When you double-click on it, a dropdown arrow appears and a dropdown list. Is this correct?

A friend of mine showed me a simple trick to do this: Create a normal editbox, and hook its double-click message. When the event occurs, dynamically create a combobox, with the same size and position of the editbox (so it completely hides the editbox). The user will choose whatever he likes, and when he presses ENTER or loses focus of the control, you xfer the information from the combobox back to the editbox, and destroy the combobox.

To sum things up:

OnDoubleClickOnEditBox:
Create Combobox on top of editbox
On ENTER or Loss-of-focus:
Xfer the data from the combobox to the editbox
Destroy the combobox.

/=/=/=/=
Deus
/=/=/=/=

Refreshing the desktop

Atlantys7-Jul-02 13:03

Atlantys

7-Jul-02 13:03

I found some cool strings to edit in the registry that affect where the desktop wallpaper is placed. Now, I wrote some code to modify those strings, but I need to showhow force a refresh/redraw on the desktop to get it to use the new settings.

Currently, the only way for the settings to be updated is for me to use the Desktop Control Panel applet and click "Apply", forcing it to redraw the background.

I tried, GetDesktopWindow()->Invalidate() but that didn't work.

I'm using C++/MFC, VC6.0

Any help/ideas people have would be great.

Thanks! Big Grin | :-D

Re: Refreshing the desktop

PJ Arends7-Jul-02 13:49

PJ Arends

7-Jul-02 13:49

Have you tried GetDeskTopWindow()->RedrawWindow()??
Don't know if it will work, but it is worth a try.

---
CPUA 0x5041

Sonork 100.11743 Chicken Little

Within you lies the power for good - Use it!

Re: Refreshing the desktop

Shog⁹7-Jul-02 14:51

Shog⁹

7-Jul-02 14:51

Try calling SystemParametersInfo() with the SPI_SETDESKWALLPAPER parameter (specify the existing wallpaper if you don't need to change it) and the SPIF_SENDCHANGE flag set.

- Shog9 -

Re: Refreshing the desktop

Atlantys7-Jul-02 20:45

Atlantys

7-Jul-02 20:45

Thank You!

Seems way too easy, now that I know what I need to do. Big Grin | :-D

*.hlp files

briefcase7-Jul-02 12:52

briefcase

7-Jul-02 12:52

How can I launch .hlp files from my application? (IE user clicks "help" button it luanches the help file).

Thanks

Re: *.hlp files

Stuart Dootson7-Jul-02 13:45

Stuart Dootson

7-Jul-02 13:45

You could try the ShellExecute Win32 API function (see the MSDN docs) - using the path to the help file as the lpFile parameter & "open" as the lpVerb parameter should do the trick - and it also works for pretty much any file you want to open that has a file association (which is nice).

Alternatively (he says, after looking in the MSDN docs), you could try the WinHelp API function - never used it myself.

Stuart Dootson

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

Re: *.hlp files

briefcase7-Jul-02 16:23

briefcase

7-Jul-02 16:23

whats the lpDirectory param supposed to be with shellexecute()?

Really Basic Overrides

7-Jul-02 9:08

Hello,

I want to override the really simple stuff in an MDI application. I'd like to override:
File->New
File->Open
Window->New

Is there a way I can find the code that VC++ uses for these commands that come already working in an MDI apllication?
If there is can someone tell me exactly where it is, like a link to the actual code or post it or something.

Thanks so much for the help,
NickOne

Re: Really Basic Overrides

Scot T Brennecke7-Jul-02 11:08

Scot T Brennecke

7-Jul-02 11:08

The best way to track these down for yourself is to start with the menu resource. Look at the command ID for the given menu item (such as ID_FILE_NEW). Then do a Find in Files for that ID (match whole words and case to speed up your search). You'll find the message map entry for that command, telling you the name of the function that handles it.

You will find all of these in your MFC\Src directory

Scot Brennecke
Software Developer
VC++ MVP

newbie- what to override to close modeless dialog by right cross

nsns7-Jul-02 8:02

nsns

7-Jul-02 8:02

I want to close my modeless dialog spawned by a CFormView mDI using the right hand side cross on the title bar, and send a message plus do some housekeeping when the cross is clicked. I put (for testing) message boxes in

1. DestroyWindow()
2. OnDestroy()
3.PostNcDestroy()

None fired when I closed my modeless dlg with the cross (whats is called anyways that cross? )

From my deductions with various combinations I found that closing the modeless with the cross does not invoke any destroy type function. Once spawned (and even if closed thereafter with the x), only when the whole app is closed with the cross, do the messageboxes fire (only for ondestroy and postncdestroy, but not destroywindow))

If I explicitly call destroywindow in the modeless dialog, it of course triggers all three messageboxes.

What needs to be done to override the cross?

Confused | :confused:

Re: newbie- what to override to close modeless dialog by right cross

Joaquín M López Muñoz7-Jul-02 8:27

Joaquín M López Muñoz

7-Jul-02 8:27

Try overriding OnClose and calling DestroyWindow from there. The cleanup code (particularly a call to delete this if no other part of the code takes care of it) is usually best placed in PostNcDestroy.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: newbie- what to override to close modeless dialog by right cross

ns8-Jul-02 4:10

8-Jul-02 4:10

Thank you,
The WM_CLOSE was the right message sent when the cross is clicked. Smile | :)

FTP download

Julie Kim7-Jul-02 6:37

Julie Kim

7-Jul-02 6:37

I have some trouble with FTP download. I'd like to make files downloaded from server as current information, but the server seems to use memory cash. Suppose that there's a file called "aaa.txt", and I downloaded. It's OK for the first time. But when the file is changed in the server even though it still keeps the same filename as "aaa.txt", I can't download the new aaa.txt. Instead, the previous aaa.txt keeps being downloaded, although the file was certainly changed on the server. The weird part is that the date of file changed in the local hard drive, so I thought it was updated as the new file at first, but everything(except the date) is same as the previous file.
I just used "GetFile" for downloading.
How can I refresh it and download changed files?
Please give me some advice! Thank you.

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