C / C++ / MFC Discussion Boards

Re: Problem with InsertMenu with respect to Release vs. Debug compulation

Eldon Zacek31-Jul-02 13:16

31-Jul-02 13:16

The problem is NOT with the ASSERTS not being present during the Release version. The problem is that ::IsMenu returns TRUE during execution in
in the Debug version but fails in the Release mode. In "FindMenuTitle",
there is an "If" clause to test the validity of ::IsMenu. In the release
mode this test fails, and thus changes are made to the menu.

Thanks for the response and I hope this clarifies the problem a little
better.

Eldon Zacek
Czech-Mate Enterprises, LLC

Re: Problem with InsertMenu with respect to Release vs. Debug compulation

Eldon Zacek31-Jul-02 17:09

Eldon Zacek

31-Jul-02 17:09

Chris,

You pointed out a problem with the code that I missunderstood. What you
found was an eventual problem but not what was wrong with what I
was seeing. After digging through the code, I found that "m_DefaultMenu"
was being loaded with an "ASSERT" macro. Thus the reason "FindMenuTitle"
was failing.

Thanks for the answer!

Eldon Zacek
Czech-Mate Enterprises, LLC

CTreeCtrl checkboxes, oleaut.dll, and MSDN

dazinith31-Jul-02 11:41

dazinith

31-Jul-02 11:41

hey guys.. got three seperate questions.. there pretty quick tho..

1)In Win95/98(1st edition) my CTreeCtrl will not show its checkboxes. Is there any way around this, or am I screwed? (i have no idea how to takle this without using checkboxes, and the data needs to be in a tree to understand it)

2)I have read alot on this oleaut.dll and .Net and win95 issue, and everyone apparently is upset about this, but they say you can get rid of the problem by delay loading the oleaut.dll. i get this message when i compile:

LINK : warning LNK4199: /DELAYLOAD:oleacc.dll ignored; no imports found from oleacc.dll

and i get this message when i try to run it on win95:

A required .DLL file, OLEACC.DLL was not found.

it says it cant delay load it cause its not used, but i cant run my program without it.. i dont get it? i can install the active accessability, but its 1.46 megs which is too big for a floppy.. which is really cruddy since my whole install and help fits on one diskette.. any other suggestsions?

3)What is up with msdn.microsoft.com? it seems like they reformated their site.. now if i search for 'CListCtrl' i get NO responces?! whats up with msdn? anyone else tried it since tuesday?

-dz

Re: CTreeCtrl checkboxes, oleaut.dll, and MSDN

dazinith1-Aug-02 4:34

dazinith

1-Aug-02 4:34

welp i found my answer to number 1 (now that msdn will let me search again)..

just add the following in your OnInitDialog() for your dialog:

..
..
CDialog::OnInitDialog();

m_tcMyTree.ModifyStyle(TVS_CHECKBOXES, 0);
m_tcMyTree.ModifyStyle(0, TVS_CHECKBOXES);
..

Somehow that makes the checkboxes showup.. its strange cause they showed up on 98 second edition, and higher without these commands.. but whatever works eh?

-dz

CWnd::OnActiveApp( ): WTF is HTASK???

BlackSmith31-Jul-02 11:31

BlackSmith

31-Jul-02 11:31

One of the CWnd::OnActiveApp() message parameters is HTASK. I dug all over the MSDN (On/Offline) and written some blur thingy about "the handle identifies the task that owns the CWnd being de/activated". Is it process ID? process handle?
HINSTANCE? In another way: WTF@#$%! is HTASK in this context??? Mad | :mad:

Plz respond, over.

--BlackSmith--

"With the help of all mighty", 2001, Me.

Re: CWnd::OnActiveApp( ): WTF is HTASK???

Stuart Dootson31-Jul-02 13:20

Stuart Dootson

31-Jul-02 13:20

In the docs that come with VS.NET, CWnd::OnActivatateApp is documented as follows:

afx_msg void OnActivateApp(
   BOOL bActive,
   DWORD dwThreadID
);

Also, if you look up the docs for the underlying Windows message (WM_ACTIVATEAPP), it shows this (and this is from the VC++ 6 documentation):

LRESULT CALLBACK WindowProc(
  HWND hwnd,       // handle to window
  UINT uMsg,       // WM_ACTIVATEAPP
  WPARAM wParam,   // activation flag (BOOL)
  LPARAM lParam    // thread identifier (DWORD)
);

That backs up that when they say 'HTASK', they really mean DWORD threadId.

Hope that helps...

Stuart Dootson

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

Adding dialog to system info about file

defox31-Jul-02 11:17

defox

31-Jul-02 11:17

Hi,
anybody know, how can I add my own dialog box to system informations (right click on file in explorer) about file? Can anybody tell me how or where are the informations about this??
thanks
defox

DrawDragRect() help

Stew31-Jul-02 11:12

Stew

31-Jul-02 11:12

I;m trying to add functionality to my app that will allow users to draw a box around a group of items in the view to select. This would function much like in power point and the like where you can select a group of items. It would even function like the dialog creation/editing part of VC++. Anyway, I'm trying to use DrawDragRect but am getting some unwanted results what with the default brush and all.

Does anyone have any ideas on how to make this work? The code that I'm using in my OnMouseMove is:

aDC.SetROP2(R2_NOT);
CRect lpRect = CRect(m_FirstPoint, point);
aDC.DrawDragRect(lpRect, CSize(1, 1), m_RedrawRectLast, CSize(1, 1), NULL, NULL);
m_RedrawRectLast = lpRect;

Static vs. Shared MFC in dll

dartonw31-Jul-02 9:34

dartonw

31-Jul-02 9:34

Please bear with me, this is a lot to explain...

I have a C++ dll that I wrote to call Crystal Reports API functions. It basically just modifies query statements and exports to different formats or prints to a printer. When compiled with debug settings, using MFC statically linked, it works fine on Win2k Server. When compiled as a final release, using MFC as a shared library, it works fine, with one exception: when the report needs to create multiple html pages during the export process, I get a very general Crystal Reports error (Operation not yet implemented). Sounds like a Crystal Reports problem, I know. But there's more---

After much testing, I realized that if the correct number of files (or more) already exist, this error does not occur using the MFC shared dll. It seems to just overwrite the existing files, but it will not create them. The statically linked dll, however, will create the files. Sounds more like an MFC problem, now.

I'm compiling on a WinXP Pro PC, using VC++ 6.0 SP5. I've also tried compiling release version with MFC statically linked, but of course the linker ignores references to kernel32.dll, so it's not the same and the error still occurs. Incidentally, my PC at home, running software identical to the Win2k server except for the OS (it's XP), runs this dll just fine compiled either way. So I had a co-worker compile it on Win98, thinking maybe it had something to do with XP, and the exact same behavior occurred. I guess I'll try Win2k next...

Anyway, any insight into this problem would be greatly appreciated, as this is driving me nuts. I'm fairly experienced with C++, but I don't know much about MFC. It would be nice to have this dll around the 36K size that it should be, though, rather than the 1.33MB that it is right now.

~DW

Re: Static vs. Shared MFC in dll

Navin31-Jul-02 9:53

Navin

31-Jul-02 9:53

I *always* statically link MFC - because you can't be sure what version of MFC42.DLL the user has on their system, so you may have to install a new one. And I hate having to install over system DLL's.

But I have read that there is a macro, called AFX_MANAGE_STATE, that you need to call for any expoted function. It goes something like this:

AFX_MANAGE_STATE(AfxGetStaticModuleState());

According to this MFC book (Inside Visual C++), this macro exists because there are some global variables that need to be synchronised correctly in these scenarios.

Even if you win the rat race, you're still a rat.

Re: Static vs. Shared MFC in dll

Ranjan Banerji31-Jul-02 10:45

Ranjan Banerji

31-Jul-02 10:45

>>Even if you win the rat race, you're still a rat.

And whats your point? Smile | :)

Thats a good one......

An editBox and variable CString

ns31-Jul-02 9:23

31-Jul-02 9:23

SO far whenevr I created a member variable associated with an editBox I've made it of type CEdit (control not CString), but the Class wizard also offers the choice of CString. I didnt think much about it. But in a sample I am following, I see that a CString variable m_editString has been created for an IDC_EDIT1, and by magic the text put into m_EditString, populates the editbox! I was expecting to see the usual member of type CEdit and stuff like:

myCedit.SetWindowText(someCString).
I've hunted high and low in the sparse sample code and dont see anyplace where the string is being assigned to the editbox. SO is this something internal that happens if you create a CString variable instead of a CEdit variable and associate it with a CEdit?

Basically I wasnt curious about what the option - Control or Value was present for. Please clarify if my deductions are correct? I am probably totally off the mark, but I really do not see anyplace where a string is being setwindowtexted. Hope my question is clear.
Thanks,
ns

Re: An editBox and variable CString

PJ Arends31-Jul-02 9:31

PJ Arends

31-Jul-02 9:31

It is handled in your dialog's DoDataExchange function. You will find a wizard generated call to DDX_Text() that assigns the string to the editbox. Alternatively, if you specify a max string length when you are in Class wizard, you will find a DDV_MaxChars() call associated with the same edit control

HTH

CPUA 0x5041

Sonork 100.11743 Chicken Little

"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies

Within you lies the power for good - Use it!

Re: An editBox and variable CString

Ravi Bhavnani31-Jul-02 9:54

Ravi Bhavnani

31-Jul-02 9:54

I prefer to manually get/set CStrings from edit controls because it allows me full control over validating the user's input. I set controls in the dialog's OnInitDialog() handler, and get the controls' values in OnOK().

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

Re: An editBox and variable CString

lucy31-Jul-02 10:08

lucy

31-Jul-02 10:08

well, personally, I prefer CString, if you just want to deal with its text display and retrieving. As the above post mentioned, this is done by MFC via data exchange and data validation.

use UpdateData(TRUE) to get user input for this CString variable, while UpdateData(TRUE) in place for SetWindowText.

Thank you all!

nss31-Jul-02 13:19

nss

31-Jul-02 13:19

Definitely something new I learned today! I'd never even pondered why there were two choices - Value or Control when setting a variable for CEdit!!
Appreciate the responses,
ns;P

COM interfaces and apps

Aaron Schaefer31-Jul-02 8:56

Aaron Schaefer

31-Jul-02 8:56

Hi All,

I've got an existing app (MFC MDI app) that does some neat calculations. I have been running this app manually, but now I need to be able to "talk" to the app from another application. I'm thinking COM interface, but not sure exactly how this works. The other app needs to be able to control the MDI app, change data structures, stuff like that. I tried to make a new MFC project with "Automation" checked, and got another MFC app whose document sported a disp interface, but wasn't too sure what to do with that.

So, here's my question. Assuming I've imlpemented an MFC app with automation support, and added some methods I would like to call, how can I A) Fire off this app from an existing ATL COM object (In proc) B) Invoke methods on the document and C) prevent the user from interacting with the app.

Thanks in advance,

Aaron

How to Rollup a Window

Atlantys31-Jul-02 8:35

Atlantys

31-Jul-02 8:35

No, this is not a question about cars Big Grin | :-D

I would like to add functionality to my MFC dialog so that the user can click a button to make the window "rollup". Similar to the middle top-right button in Winamp.

Anyone have any ideas on this?

I'd prefer it if I could make the design similar to Winamp in that a "new" dialog is shown as the "rolled up" window, but if this is not possible, then just showing the title bar is acceptable (I suppose). I assume doing it this second way would just be resizing dialog to something slightly bigger than the titlebar, now that I think about it. Frown | :(

TIA.

Re: How to Rollup a Window

PJ Arends31-Jul-02 9:26

PJ Arends

31-Jul-02 9:26

Having never seen Winamp, I am not sure what you want, but is this <clickety> what you are looking for?

Re: How to Rollup a Window

Atlantys31-Jul-02 10:29

Atlantys

31-Jul-02 10:29

That's *sort of* what I mean, but I'm looking to rollup the whole app (so it's just like the Minimize or Close system buttons), instead of a just child window of a larger app.

PJ Arends wrote:
Having never seen Winamp
OMG | :OMG:

What do you use for mp3s then?? please don't say WMP7. Big Grin | :-D

Re: How to Rollup a Window

PJ Arends31-Jul-02 12:25

PJ Arends

31-Jul-02 12:25

mp3s

I actually prefer talk radio. This <clickety> radio station is left on 24/7 in my house.;)

Re: How to Rollup a Window

Atlantys31-Jul-02 12:44

Atlantys

31-Jul-02 12:44

From BC I take it? I call Victoria home, but right now I'm in a little town called Kitchener/Waterloo for a few more (hellish) years. Big Grin | :-D

Re: How to Rollup a Window

PJ Arends31-Jul-02 12:53

PJ Arends

31-Jul-02 12:53

Atlantys wrote:
From BC I take it?

Abbotsford.

Atlantys wrote:
I call Victoria home, but right now I'm in a little town called Kitchener/Waterloo for a few more (hellish) years.

Oh man Frown | :(

you gotta come back to lotusland, the weather is great Big Grin | :-D

Re: How to Rollup a Window

PJ Arends31-Jul-02 13:14

PJ Arends

31-Jul-02 13:14

I would think it could work if you used a dialog template for the minimized window, just remove the title bar. When your app is "minimized", just destroy your main window, and recreate your main window using your minimized dialog. Of course this would be a lot easier to implement if your main window is also a dialog;P.

If you want the window to visible shrink, you would have to use a timer and SetWindowPos().

Re: How to Rollup a Window

JohnnyG31-Jul-02 10:32

JohnnyG

31-Jul-02 10:32

It can't be that hard. Why not use SetWindowPos( ) keeping the left and top coordinates the same and resize the height and/or width of the window?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.