C / C++ / MFC

9-Jul-07 21:51

Hi everybody,

i put a ListControl on a dialog and want to catch the LVN_BEGINDRAG Handler.
I know that LVN_BEGINDRAG is a notify message.

I tried already :

ON_NOTIFY_REFLECT(LVN_BEGINDRAG,OnBeginDrag)

and via :

OnNotify(WPARAM w,LPARAM l, ...
{
if(((LPNMHDR)l)->code == LVN_BEGINDRAG)
int ok = 1; --> breakpoint

but i can't catch it Unsure | :~

I tried also directly to add a handler via the ressource editor by adding a new handler,
but there i can't find the LVN_BEGINDRAG handler, only DoubleClick, Set & KillFocus ...

How should i catch it?

Big thanks Smile | :)

Aamir Butt9-Jul-07 23:35

Aamir Butt

9-Jul-07 23:35

Try this:

ON_NOTIFY(LVN_BEGINDRAG, IDC_LISTVIEW1, OnLvnBeginDrag)

This should work.

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baerten10-Jul-07 0:02

10-Jul-07 0:02

Thanks for your answer Smile | :)

Is it necessairy to create a class from this Listbox from which i want to catch the Drag?

Because it won't work Frown | :(

Hamid_RT10-Jul-07 1:22

10-Jul-07 1:22

Dont need to it.Maybe you want to see Drag and Drop between and within a CListCtrl[^].(if you want to listctrl on your previous message)

WhiteSky

baerten10-Jul-07 3:38

10-Jul-07 3:38

Thanks for the tutorial,

but i really don't find where i can add the LVN_BEGINDRAG-handler via the classwizard.
I tried a lot of things, but no way to find a LVN_BEGINDRAG.

Unsure | :~

Mark Salsbery10-Jul-07 6:28

Mark Salsbery

10-Jul-07 6:28

You may actually have to type it in by hand Smile | :)

For the handler prototype(s), see ON_NOTIFY and WM_NOTIFY Messages[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++

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Hamid_RT10-Jul-07 8:34

10-Jul-07 8:34

Insert this code to your program

///On the cpp file insert these codes
BEGIN_MESSAGE_MAP(CDialogDlg, CDialog)
	ON_NOTIFY(LVN_BEGINRDRAG, IDC_LIST2, OnLvnBeginrdragList2)
END_MESSAGE_MAP()


void CDialogDlg::OnLvnBeginrdragList2(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}

///And on the header file insert this code
	afx_msg void OnLvnBeginrdragList2(NMHDR *pNMHDR, LRESULT *pResult);

WhiteSky

baerten10-Jul-07 21:11

10-Jul-07 21:11

Big thanks Smile | :)

,

my code was completely correct, but probably the CListbox don't support drag&drop,
with CListCtrl it works fine

Hamid_RT10-Jul-07 21:28

Method SetEnvironmentVariable not working !

10-Jul-07 21:28

I suggest use of CListCtrl on your program its better and very flexible than CListBox.;)

WhiteSky

Yanshof9-Jul-07 20:52

Yanshof

9-Jul-07 20:52

Hi All,

I calling the method SetEnvironmentVariable and i getting back return value that is nonzero and the last Error does not return to me nothing.

BUT

The Environment Variable is not set !?

What to do ?

Thanks for any help.

Naveen9-Jul-07 21:40

Naveen

9-Jul-07 21:40

Yanshof wrote:
SetEnvironmentVariable

This function will set the environment variable for the current process only. I will not change the whole system's environment variable.

nave

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Yanshof9-Jul-07 22:26

Yanshof

9-Jul-07 22:26

Thanks,

How can i create new environment variable and/or change exist one data ?

Dominik Reichl9-Jul-07 22:44

Dominik Reichl

9-Jul-07 22:44

See http://www.codeproject.com/tools/SetEnv.asp[^].

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David Crow10-Jul-07 3:22

David Crow

10-Jul-07 3:22

To change system environment variables, modify the HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment registry key.

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Desktop drawing

rvdwerf9-Jul-07 20:51

rvdwerf

9-Jul-07 20:51

Hi,

I wanted to make my program to work on the desktop.
like http://desktop-tools.net/clock.html

i tried many things but i just dont know how did they do it? i dont know about any technique to make it transparant.

Is this possible or is it somesort of rendercode that creates a picture from what you need to have on the desktop and so making everything arround the text transparant? i hope there is a easier way.

Greetz
Rob

Hamid_RT9-Jul-07 21:19

9-Jul-07 21:19

See IActiveDesktop::SetWallpaperfor set wallpaper on the desktop.

WhiteSky

rvdwerf9-Jul-07 21:59

rvdwerf

9-Jul-07 21:59

thx but then iam setting the whole wallpaper on every refresh of the application :P
isnt there a more useable way then creating wallpapers the whole time?

Hamid_RT10-Jul-07 1:20

10-Jul-07 1:20

See Change desktop wallpaper.[^]

WhiteSky

Hamid_RT10-Jul-07 21:28

10-Jul-07 21:28

Did your solve solve or no?

WhiteSky