C / C++ / MFC Discussion Boards

How to be unable to select item(s) in menu when right-clicked

Na_Su1-Sep-04 16:16

1-Sep-04 16:16

Hello, everyone.

I'd like to develop ".exe" file by using VC++ 6 SP5 with Windows XP SP1.
The content is that during executing this program, when right-click is done over the icon of file or folder in Explorer,
the user can't select item(s) of popup menu(context menu).
This "can't select" means that item(s) such as "open" or "edit" etc, is/are disapeeared completely.
Or the name of item is appeared with gray and unable to select.

I read topics in "Shell Programming", but I could't find helpful topic about above method. Sigh | :sigh:

Is it some experienced in development?
Or are someone known method?
If knows, and helpful www link(s) also exist(s), I'm glad.
Please tell me.

Re: How to be unable to select item(s) in menu when right-clicked

lonely_life1-Sep-04 19:12

lonely_life

1-Sep-04 19:12

.EnableWindow(FALSE)

Re: How to be unable to select item(s) in menu when right-clicked

Na_Su1-Sep-04 23:21

Na_Su

1-Sep-04 23:21

>wisecrack:
Thank you for answering.

By the way, after posting message I looked into more information.
And I found that "CMenu:CEnableMenuItem" may be right.
My goal is to develop MFC project of dialog base.
For example, here is a goal that when right-clicked over the icon of text file in Explorer,
the item "cut" is glay.

The below is the method.
I created new MFC project of dialog base.
(The project name is "Click".)
And I added below code of "OnRButtonDown" with Class Wizard into "CClickDlg.cpp" file:
===
void CClickDlg::OnRButtonDown(UINT nFlags, CPoint point)
{
// TODO:
CMenu *hMenu;
CWnd* cwParent = GetParent();
DWORD dwStyle = cwParent->GetStyle();
hMenu = cwParent->GetSystemMenu(FALSE);
hMenu -> EnableMenuItem(ID_EDIT_CUT, MF_GRAYED);
CDialog::OnRButtonDown(nFlags, point);
}
===

And including "afxres.h" in the first of "CClickDlg.cpp" file, I built "Click.exe" file.
With "Click.exe" executing, I executed "explorer.exe" and I clicked right button
over a certain text file.
But the item "cut" wasn't glay.

Which point of my method is wrong?
If there is another good idea or programming flow, please tell me.

Download Managers

Archer2821-Sep-04 12:43

Archer282

1-Sep-04 12:43

Many Download Managers allow you to pause and resume your download, some are even able to resume after being disconnected.

Now my question is how do they pick up where they left off? I'm guessing there is some standard information sent in the request as to where the server should start reading from the file.

Re: Download Managers

Stefan Pedersen1-Sep-04 14:16

Stefan Pedersen

1-Sep-04 14:16

Well, it isn't even remotly connected to Visual C++ but what the heck...

If you are talking about FTP download managers the some (most) servers support the REST (restart) command. Check the RFC for more info.

And if the paths that I have followed/have tread against the flow/there is no need for sorrow
I am coming home
Return, Crüxshadows

Re: Download Managers

Michael Dunn1-Sep-04 17:57

Michael Dunn

1-Sep-04 17:57

HTTP* also lets you request a portion of a file from a server, so you can request say from byte 123456 to the end to resume a download.

*or maybe it's HTTP 1.1 only, I'm not a networking guru so I don't know OTTOMH

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
Come quietly or there will be... trouble.

Re: Download Managers

James R. Twine2-Sep-04 10:09

James R. Twine

2-Sep-04 10:09

Yes, I believe it is HTTP 1.1 that supports resumable downloads.

Michael Dunn wrote:
Come quietly or there will be... trouble.

Robocop? Smile | :)

Peace!

-=- James
Tip for inexperienced drivers: "Professional Driver on Closed Course" does not mean "your Dumb Ass on a Public Road"!
Articles -- Products: Delete FXP Files & Check Favorites

How to hide program on execution

Kamis1-Sep-04 11:58

Kamis

1-Sep-04 11:58

I need the main window of my program (created by DialogBox() function) to become hidden already on the startup. If I call ::ShowWindow(hWnd,SW_HIDE) when I receive WM_CREATE or WM_INITDIALOG messages, it doesn`t work because these messages are regeived before dialog is shown. So how can I do it? I can not write consele app because I will need to show the window eventually.

Re: How to hide program on execution

alex.barylski1-Sep-04 14:59

alex.barylski

1-Sep-04 14:59

Hide your main window...???

Interesting...you could try using a similar approach to system tray windows. Make a parent window using WS_EX_TOOLWINDOW and have your main window a child of this window.

How do I print my voice mail?

Re: How to hide program on execution

lonely_life1-Sep-04 19:01

lonely_life

1-Sep-04 19:01

I am not sure whether this is what u want
http://www.codeproject.com/system/xyntservice.asp

how:Name function after API name??

happycpp1-Sep-04 11:35

happycpp

1-Sep-04 11:35

hi everyone..
I'm working on a project to make a dll that contains some functions...I want to name some functions the same name that some APIs do..
e.g. I want to make my own "FormatMessage" function in my dll...

Re: how:Name function after API name??

Christian Graus1-Sep-04 11:56

Christian Graus

1-Sep-04 11:56

Put them in a namespace. It's still a terrible idea.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Re: how:Name function after API name??

happycpp3-Sep-04 6:09

happycpp

3-Sep-04 6:09

I actually don't know how to do that could you write a simple function using this way...

Re: how:Name function after API name??

Christian Graus5-Sep-04 10:12

Christian Graus

5-Sep-04 10:12

namespace ThisIsAHorribleIdea
{
void MyAPIFunction()
{
}
}

Now you need to call it like this : ThisIsAHorribleIdea::MyhAPIFunction();

And if you don't know what a namespace is, you should buy a beginners book on C++ and read it before you go any further.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

ansi c: gets dangerous

kfaday1-Sep-04 10:49

kfaday

1-Sep-04 10:49

Hi, i'm doing an ansi c program, compiling with gcc. I get a warning that the gets function is dangerous. Everything works fine, but i don't want to get that warning.

char *Comando=0;
Comando=(char*)malloc(150*sizeof(char));

gets(Comando);

I can't (or don't know how to) use scanf as if i type a string with spaces scanf only saves the characters until the first space.

which function could i use apart from gets (and it must be ansi c )?
thanks!

Re: ansi c: gets dangerous

Stefan Pedersen1-Sep-04 14:13

Stefan Pedersen

1-Sep-04 14:13

The problem with gets() is that is doesn't consider the size of the destination buffer. In your case just enter more that 150 characters and PRESTO! Insta-crash(tm). May I recomand fgets() instead?

And if the paths that I have followed/have tread against the flow/there is no need for sorrow
I am coming home
Return, Crüxshadows

Re: ansi c: gets dangerous

Henry miller2-Sep-04 3:47

Henry miller

2-Sep-04 3:47

That warning is telling you that it is IMPOSSIBLE to use gets correctly! If your program uses gets I can crash it. Any professor who sees gets in code should automaticly give the student an F!

instead you should use fgets, which can replace your use of gets like this:

fgets(Comando,150,STDIN);

See, it is easy to use fgets, and I can no longer crash your program just be doing something stupid.

Re: ansi c: gets dangerous

kfaday3-Sep-04 16:07

kfaday

3-Sep-04 16:07

thanks, i used fgets

Re: ansi c: gets dangerous

James R. Twine2-Sep-04 10:24

James R. Twine

2-Sep-04 10:24

   There is an extension to the scanf(...) function that allows to scan non-space-delimited strings. I do not know if it is available in GCC's libraries...

   It works like this: to scan a string that is terminated by a semicolon, your format specifier would be: %[^;]. For example, if you wanted to scan this string:

C:12345;B:09876

   And extract the two numeric values into two strings (12345 and 09876), you would write something like:

    char caStringBuf1[ 64 + 1 ];<br />
    char caStringBuf2[ 64 + 1 ];<br />
<br />
    sscanf( "C:12345;B:09876","C:%[^;];B:%s", <br />
          caStringBuf1, caStringBuf2 );<br />
    caStringBuf1[ 64 ] = '\0';<br />
    caStringBuf2[ 64 ] = '\0';

You would want to limit the input test somehow, of course and add some validation code, but that would scan the string correctly.

Peace!

-=- James
Tip for inexperienced drivers: "Professional Driver on Closed Course" does not mean "your Dumb Ass on a Public Road"!
Articles -- Products: Delete FXP Files & Check Favorites

How do I change the Icon.

nigma_x1-Sep-04 10:48

nigma_x

1-Sep-04 10:48

I'm using Visual C++.net 2002 with MFC's. Created the project then built it. I changed the Icon after the build with the Icon editor. The problem is now only the about box shows the change. The .exe file and SDI dialog shows the MFC icon. What setting do I change to have my icon take effect?

Re: How do I change the Icon.

Graham Bradshaw1-Sep-04 12:22

Graham Bradshaw

1-Sep-04 12:22

An icon can have multiple colour depths and sizes in one .ico file. It sounds to me like you are editting the 32x32 icon, which is displayed in the about box, but not editting the 16x16 icon.

If you view large icons in Explorer, do you see your changed icon for the exe?

Re: How do I change the Icon.

nigma_x2-Sep-04 3:44

nigma_x

2-Sep-04 3:44

Thanks, did not know that there where different sizes for the Icon. Which each had to be changed. Just thought C++ changed the size for you. LOL. Well that did it and I know have my own crappy but orginal icon in my program. Thanks again.

WM_CAPTURECHANGED, lParam=0

cowwoc20021-Sep-04 10:46

cowwoc2002

1-Sep-04 10:46

Hi,

I am getting WM_CAPTURECHANGED messages with lParam=0 and then my WindowProc stops getting messages (because my focus has disappeared). How is this legal? lParam is supposed to contain the HWND of the window that stole focus away from my WindowProc but it is zero which is an illegal value. How do I find out who has taken focus? Is this documented anywhere?

Thank you,
Gili

Re: WM_CAPTURECHANGED, lParam=0

darkbyte1-Sep-04 13:17

darkbyte

1-Sep-04 13:17

Don't know if this is documented somwhere but this sounds like Screen Saver attempt at getting the focus before actually going in Screen Saver mode.

Re: WM_CAPTURECHANGED, lParam=0

Anonymous1-Sep-04 17:17

Anonymous

1-Sep-04 17:17

This is actually what you get when you click on the desktop and drag a rectangle. So, to answer your previous post, it isn't some sort of screensaver... but something is taking the focus away from the desktop. I will keep on looking.

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