C / C++ / MFC

Re: Help with ownerdrawn CListBox class

27-Aug-01 10:08

I think you can achieve this by handling (reflected) WM_CTLCOLORLISTBOX in CYourListBox.

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

Dave Glick28-Aug-01 2:44

Dave Glick

28-Aug-01 2:44

Thanks Tomasz, that's exactly what I needed. Just swap out the brush in there and it works perfectly...

Dave

Delayload won't work for DLL itself?

Kurotora27-Aug-01 5:12

27-Aug-01 5:12

Hi,

I've been writing application for Windows 95/98/Me which loads private DLL. In that DLL, I need to call functions in oleacc.dll that is not supported in Windows 95. To let single binary work on 3 different Windows, I tried Delayload option.

/delayload:oleacc.dll option seems worked, since dependency walker didn't show oleacc.dll is used. Though, when I tried to load my private DLL by LoadLibrary(), it failed. (I'm using LoadLibrary() and GetProcAddress() to control my DLL to handle any error regarding to this DLL.) And of course, it worked fine on 98/Me.

I'm quite sure any function belongs to oleacc was not called in DllMain(). If I commented out those functions, linker warned me that /delayload:oleacc.dll had no effect (which is supposed to be), and I could load my DLL.

So, for me, it looks like Delaylod won't work for DLL itslef. Thinking about a background of this mechanism, I can't understand why it didn't work.

Can anyone help me out? (Please forget about installing some optional kit on Windows 95, since my target is Japanese version and no one is available for that.)

I love Code Project, do you?
Kurotora

Masaaki Onishi27-Aug-01 7:04

Masaaki Onishi

27-Aug-01 7:04

Hello, the codegurus around the world.;)

Actually, I can't understand your question very well.

However, if you try to use DelayLoadProfile.exe from Matt in MSJ,
DelayLoadProfile can't hook DLL calling from LoadLibrary as
some ppls pointed out DLL site of this CodeProject.
DelayLoadProfile only works for import table defined *.def to DLL.

But, we can hook LoadLibrary and GetProcAddress from kernel32.dll by DelayLoadProfile.exe. Cool | :cool:

Have a nice day!

-Masaaki Onishi-

Kurotora27-Aug-01 7:39

Re: Now, I understand your questions.

27-Aug-01 7:39

Masaaki,

I'm not interested in Delayloadprofile.exe at all. Confused | :confused:

My question is, can DLL load another DLL when needed by using /delayload linker option as we do with EXE.

Getting idea?

I love Code Project, do you?
Kurotora

Masaaki Onishi27-Aug-01 14:01

Masaaki Onishi

27-Aug-01 14:01

Hello, the codegurus around the world.;)

Eventually, I understood your question. Roll eyes | :rolleyes:

I didn't make DLL with loading DLL with delayload option. Dead | X|

However, I got some reference about delayload in MSDN help.

Constraints of Delay Loading DLLs
There are constraints regarding the delay loading of imports. 

Imports of data cannot be supported. A workaround is to explicitly handle the data import yourself using LoadLibrary (or GetModuleHandle after you know the delay-load helper has loaded the DLL) and GetProcAddress.

Delay loading Kernel32.dll not supported. This DLL is necessary for the delay-load helper routines to perform the delay loading.

Binding of entry points that are forwarded is not supported.

Delay loading of a DLL may not result in the same behavior of the process if there are per-process initializations that occur in the entry point of the delay-loaded DLL. Other cases include static TLS (thread local storage, declared using __declspec(thread) which is not handled when the DLL is loaded via LoadLibrary. Dynamic TLS, using TlsAlloc,TlsFree,TlsGetValue,TlsSetValue is still available for use in either static or delay-loaded DLLs.

Static (global) function pointers should be reinitialized to imported functions after the first call to the function. This is because the first use of the function pointer will point to the thunk.

Have a nice day!

-Masaaki Onishi-

Tomasz Sowinski27-Aug-01 12:00

27-Aug-01 12:00

I'm quite sure any function belongs to oleacc was not called in DllMain().

Maybe there are some global objects with c'tors calling oleacc functions? What's the error code after LoadLibrary?

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

Kurotora28-Aug-01 5:07

28-Aug-01 5:07

Tomasz,

o No, there is no such objects related to oleacc.
o LoadLibrary() returned zero.

I'm mostly giving up to make single binary work on 3 different Windows. Cry | :((

I love Code Project, do you?
Kurotora

Tomasz Sowinski28-Aug-01 5:19

28-Aug-01 5:19

LoadLibrary() returned zero.

Check the value returned by GetLastError. BTW: below you'll find the Win95-related note from LoadLibrary docs.

Windows 95: If you are using LoadLibrary to load a module that contains a resource whose numeric identifier is greater than 0x7FFF, LoadLibrary fails.

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

Kurotora28-Aug-01 6:01

28-Aug-01 6:01

Tomasz,

GetLastError() returns 0x1f (ERROR_GEN_FAILURE).
Same code works on Windows 98 (but it could be loading oleacc).

Thanks.

I love Code Project, do you?
Kurotora

Tomasz Sowinski28-Aug-01 7:11

28-Aug-01 7:11

There's a KB article Q200767 dealing with ERROR_GEN_FAILURE and LoadLibrary. However, it applies to both Win95 and Win98.

Last idea: try adding /delay:nobind to linker options.

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

Kurotora29-Aug-01 4:28

Re: CListView AND CListCtrl

29-Aug-01 4:28

Tomasz,

/delay:nobind option didn't work.

Thanks anyway.

I love Code Project, do you?
Kurotora

CListView AND CListCtrl

27-Aug-01 5:03

Is it possible to subclass the CListCtrl in a CListView?
When I try it from CListView::OnCreate(), it fails while inside the Attach() function. The error indicates that the control has already been subclassed? Confused | :confused:

I have seen many articles on the web that say you need to derive from CView instead of CListView (and add a CListCtrl member), and move the CListCtrl to cover the view. Is this really the only way to use your own CListCtrl in a CListView?

Tomasz Sowinski27-Aug-01 10:02

Tree Control & Edit Label

27-Aug-01 10:02

CListView is a wrapper over Win32 list control, the control is already subclassed for you by MFC. Just handle the messages in a CListView derived class. You don't need a child CListCtrl, unless you plan to reuse it as a control (not a view) in the future.

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

Derek Price27-Aug-01 4:53

Derek Price

27-Aug-01 4:53

Hello,

I have a tree control that I would like to do in-place editing of the labels. But, I only want to be able to edit certain levels. I currently have a context menu that gets enabled when on the appropriate level and calls myTree.EditLabel(sHItem) which is exactly what I want. However, when I check "Edit Labels" on the tree control in the resource tab, everything is editable. If I don't check this, then I crash when I call EditLabel(). Is there a way around this?

Assuming I get everything working, I have a couple more questions. How do I capture once the user is done editing. I may want to prevent them from renaming or provide a warning message if they proceed. The problem I see is each level has different contraints that I have to handle. Do I have to provide all the logic for each level in the OnEndlabeledit() handler?

Thanks in Advance!
Derek

Tomasz Sowinski27-Aug-01 10:24

27-Aug-01 10:24

However, when I check "Edit Labels" on the tree control in the resource tab, everything is editable.

Handle TVN_BEGINLABELEDIT notification. Return TRUE to cancel label editing.

How do I capture once the user is done editing.

TVN_ENDLABELEDIT, wrapped by OnEndlabelEdit handler. Return FALSE to reject the edited text and revert to the original label.

Do I have to provide all the logic for each level in the OnEndlabeledit() handler?

Yes.

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

Derek Price27-Aug-01 10:30

Derek Price

27-Aug-01 10:30

Thanks - I worked through some of that, but you confirmed my suspicions!

I have a new problem related to this. If I only want to allow in-place label editing from a right-click context menu - say "Rename", how do I do this and not allow the tree to do the in-place editing as well. What I'm looking for is the same functionality as in regedit.exe and the right-click "Rename" command on a key, value, etc.

You've helped me in the past and I truly appreciate it!

Tomasz Sowinski27-Aug-01 10:42

27-Aug-01 10:42

how do I do this and not allow the tree to do the in-place editing as well.

Just handle TVN_BEGINLABELEDIT. Check the HTREEITEM and decide if editing is OK - if not, return TRUE to disable it.

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

What is meaning is the "X" in "AFX"?

Derek Price27-Aug-01 10:54

Derek Price

27-Aug-01 10:54

I'm already enabling/disabling the appropriate tree levels in the OnBeginlabeledit() method, so what would the HTREEITEM structure give me? I only want the right-click menu to allow the in-place editing.

I'm wondering if I should set a flag (kludge) in my OnRename() method and then check for it in the OnBeginlabeledit() method.

Maer72727-Aug-01 3:21

Maer727

27-Aug-01 3:21

What is meaning of the "X" in "AFX"?

Thanks.

Maer

Steen Krogsgaard27-Aug-01 4:21

Steen Krogsgaard

27-Aug-01 4:21

"Application FrameworX" AFAIK

Cheers
Steen.

"To claim that computer games influence children is rediculous. If Pacman had influenced children born in the 80'ies we would see a lot of youngsters running around in dark rooms eating pills while listening to monotonous music"

Maer72727-Aug-01 4:46

Maer727

27-Aug-01 4:46

Thanks my pal.

What I do not understand is the meaning of "X"?

Can you help?

Thanks.

Maer

Steen Krogsgaard27-Aug-01 4:51

Steen Krogsgaard

27-Aug-01 4:51

Let me look this up in "MFC Internals", but I'm pretty sure that the X doesn't mean anything. It's just a sexy way of pronouncing the last two letters in Frameworks - that's why I wrote "Application FrameworX" (not the capital A, F and X). Anyway, it's just an old name for MFC (actually I don't think MFC was ever called AFX - it was just the name it had during development. That's why you only see it in the source code").

Cheers
Steen.

"To claim that computer games influence children is rediculous. If Pacman had influenced children born in the 80'ies we would see a lot of youngsters running around in dark rooms eating pills while listening to monotonous music"