C / C++ / MFC Discussion Boards

Nick Parker4-Oct-02 12:34

4-Oct-02 12:34

Ok, I have not a clue what this error means, any ideas?

<br />
--------------------Configuration: Date - Win32 Debug--------------------<br />
Compiling...<br />
hw4c.cpp<br />
Linking...<br />
Time.obj : error LNK2001: unresolved external symbol "public: int __thiscall Time::GetMin(void)" (?GetMin@Time@@QAEHXZ)<br />
Time.obj : error LNK2001: unresolved external symbol "public: int __thiscall Time::GetHour(void)" (?GetHour@Time@@QAEHXZ)<br />
Debug/Date.exe : fatal error LNK1120: 2 unresolved externals<br />
Error executing link.exe.<br />
<br />
Date.exe - 3 error(s), 0 warning(s)<br />

Nick Parker

The goal of Computer Science is to build something that will last at least until we've finished building it. - Unknown

Re: Hmmm...Error !

Joshua Nussbaum4-Oct-02 13:19

Joshua Nussbaum

4-Oct-02 13:19

the linker cant find the functions, Time::GetMin(void) and Time::GetHour(void).

This could be because the functions have not been defined, or the library is not included in your project properties.

Re: Hmmm...Error !

Nick Parker4-Oct-02 13:33

Nick Parker

4-Oct-02 13:33

Thanks Josh, that was it, damn I hate it when things happen like that. It always seems like it's the littlest things that throw me way off. Thanks again. Smile | :)

Nick Parker

The goal of Computer Science is to build something that will last at least until we've finished building it. - Unknown

ration button

Michael Liu4-Oct-02 12:07

Michael Liu

4-Oct-02 12:07

How to gray the radio button?

mIchAel Liu
__________________________________________________________
The secret of business is to know something that nobody else knows. Wink | ;)

Re: ration button

Dimitri Rochette4-Oct-02 12:36

Dimitri Rochette

4-Oct-02 12:36

Using Win32 SDK
BOOL EnableWindow(
HWND hWnd, // handle to window
BOOL bEnable // enable or disable input
);

Weird CListView behavior, Bug?

Anonymous4-Oct-02 10:49

Anonymous

4-Oct-02 10:49

Hello,
I am seeing some weird List View behaviors.. I am trying to resize all my columns when the window is re-sized.. When i make the window bigger the header resizes fine, when I make the window smaller the header still resizes fine but I get a scroll bar at the bottom of the view (every other time its sized smaller). If I click on the scroll bar it goes away (because it should never have been drawn).. Anyone seen this? Here is a snip of the WM_SIZE..

void CMyListView::OnSize(UINT nType, int cx, int cy) 
{
	GetListCtrl().SetColumnWidth(0,cx);
	GetListCtrl().SetColumnWidth(1,0);
	GetListCtrl().SetColumnWidth(2,0);
	GetListCtrl().SetColumnWidth(3,0);
	GetListCtrl().SetColumnWidth(4,0);
	GetListCtrl().SetColumnWidth(5,0);
	
	CListView::OnSize(nType, cx, cy);
}

Never mind

Anonymous4-Oct-02 11:15

Anonymous

4-Oct-02 11:15

Never mind, I tried doing the SetColumnWidth inside the MainFrame Size function.. and every thing works as expected.

Beginner problem: drawing button in activex ctrl

Daelus4-Oct-02 10:43

Daelus

4-Oct-02 10:43

I'm trying to draw a button in my active x control.

I just need simple button/text elements, so I thought I could just use the ResourceView->Dialog to add the components visually.

However, it seems I'm only able to create Dialogs, and I'm not able to add directly to the normal visual area of the active x control.

So... my question is how do I draw, say, a simple CButton in the OnDraw area of my control?

something like:

void CAChatCtrl::OnDraw(CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid)
{
   CButton testButton = new Button();
   CRect bBounds = new CRect( rcBounds->r - 30, rcBounds->b - 30, rcBounds->r, rcBounds->b );
   testButton::Create("DrawnButon",BS_DEFPUSHBUTTON,bBounds,?,??);
}

Sorry about asking such an easy question Smile | :)

Coloured button

User 98854-Oct-02 9:43

User 9885

4-Oct-02 9:43

I need to change the background colour of a CButton? Is there any way to do it

a) without creating a new class?
b) if creating a new class, without owner-draw?

Thomas

modified 29-Aug-18 21:01pm.

Re: Coloured button

Chris Hambleton4-Oct-02 10:05

Chris Hambleton

4-Oct-02 10:05

chech out msdn article # Q132080 or # Q117778

"If at any time I announce that a nation or kingdom is to be uprooted, torn down and destroyed, and if that nation I warned repents of its evil, then I will relent and not inflict on it the disaster I had planned. And if at another time I announce that a nation or kingdom is to be built up and planted, and if it does evil in my sight and does not obey me, then I will reconsider the good I had intended to do for it." -- Jeremiah 18:7-10 (God, commenting on the value of the United Nations)

Re: Coloured button

User 98854-Oct-02 10:35

User 9885

4-Oct-02 10:35

cannot find them on msdn.microsoft.com. have a link? Frown | :(

modified 29-Aug-18 21:01pm.

Re: Coloured button

User 98854-Oct-02 10:37

User 9885

4-Oct-02 10:37

got it

modified 29-Aug-18 21:01pm.

Mixing MSVCRT and MSVCRTD

Aaron Schaefer4-Oct-02 9:36

Aaron Schaefer

4-Oct-02 9:36

Anybody know what's supposed to happen if you do this? I've got a project where it seems like both of these .dll's are present, and I seem to be getting a lot of heap warnings in the dbug build. I open up depends, and lo and behold, both of the runtimes are there.

I think I should be using the MSVCRTD alone, but it appears that the MSVCRT is getting loaded as a dependency of shell32.dll. I am calling SHGetFileInfo.

Is there a debug shell32.dll? If so, how do I get it instead of the release one?

Thanks,

Aaron

sorting CMenu items ?

Anonymous4-Oct-02 9:09

Anonymous

4-Oct-02 9:09

Is there an easy way to sort the contents of a CMenu in mfc ?

Thanks!

CPropertyPage and modeless dialog

Gero Gerber4-Oct-02 9:02

Gero Gerber

4-Oct-02 9:02

I have a class derived from CPropertyPage which contains a modeless dialog. On dialog creation I pass a client rect structure of the property page. I also handle OnSize() and OnShowWindow() in the property page class to resize/show/hide the dialog. But at startup this dialog is not correctly aligned in the property page. It is displayed beyond the property page's edges. If I move to another property page and then go back to the malicious one everything is fine. Anybode knows a solution for this....

The funny thing is that this bug happens only with Windows 98/ME - Windows 2000/XP is fine...

Gero

Re: I have the same problem in my program

lucy29-Oct-02 3:05

lucy

29-Oct-02 3:05

and I am using Windows 2000.

Anybody has any idea how to solve it? Thanks a lot!

Re: I found the solution

lucy29-Oct-02 3:38

lucy

29-Oct-02 3:38

The dialog is not properly aligned at the first time only, is because that the property sheet was moved after the first active property page was shown. This is the message handling sequence:

CMyPropertyPage::OnShowWindow()
{
    // align the modeless dialog
}
CMyView::OnInitialUpdate()
{
    // place the property sheet at the top left corner
    m_sheet.MoveWindow(&sheetRect, TRUE);
}

so the solution is: reshow the property page after the property sheet is moved to a correct position. My method is:

CMyView::OnInitialUpdate()
{
    // place the property sheet at the top left corner
    m_sheet.MoveWindow(&sheetRect, TRUE);

    m_sheet.GetActivePage()->SendMessage(WM_SHOWWINDOW, FALSE, 0);
    m_sheet.GetActivePage()->SendMessage(WM_SHOWWINDOW, TRUE, 0);
}

HTH.

A simple hooking problem

generic_user_id4-Oct-02 8:50

generic_user_id

4-Oct-02 8:50

I'm trying to hook up to another program, using SetWindowsHookEx.

I need to hook to a specific application (ie: calc.exe) so a global hook shouldn't be neccecary.

HHOOK hook = SetWindowsHookEx(WH_MOUSE,
                             (HOOKPROC) MouseHookProc,
		             AfxGetInstanceHandle(),               
                             tID // Thread ID of Calc.exe
                             );

SetWindowsHookEx returns 0, the hook is set succesfully. Yet, when I move with my mouse over the calc dialog, the calculator crashes.

I think I need to use the Process instance of calc.exe instead of the instance of the program that hooks to it. If that is the case, how can I get the HINSTANCE of a process?

If that's not the case, what am I doing wrong?

Thanks in advance and kind regards,

Griffith

Everything you say will be misquoted, ripped out of context and used against you.

Re: A simple hooking problem

Scott H. Settlemier4-Oct-02 10:22

Scott H. Settlemier

4-Oct-02 10:22

You gotta put the hook procedure in a dll that can be loaded by Calc.exe's process. Then pass SetWindowsHookEx the HINSTANCE for that dll as loaded into your process. (as well as the pointer to the hook procedure)

Re: A simple hooking problem

generic_user_id4-Oct-02 11:11

generic_user_id

4-Oct-02 11:11

Okay, thanks I'll try that then.

Cheers

Griffith

Everything you say will be misquoted, ripped out of context and used against you.

Re: A simple hooking problem

Joel Lucsy6-Oct-02 7:41

Joel Lucsy

6-Oct-02 7:41

A return of 0 means it didn't work. NULL = 0. Check the docs. As previously mentioned, the actual procedure needs to be in a dll.

Joel Lucsy (jjlucsy@concentric.net)

Re: A simple hooking problem

generic_user_id7-Oct-02 4:06

generic_user_id

7-Oct-02 4:06

My mistake, I meant to say that GetLastError() returned 0, just after I attempted to create the hook.

I thought I had to place the procedure in a DLL only for system-wide hooks, but it appears it's in order for all hooks outside of the calling process.

Griffith

Everything you say will be misquoted, ripped out of context and used against you.

class not accessible in class wizard...

nss4-Oct-02 8:40

nss

4-Oct-02 8:40

I added a cpp /.h file pair which has definitions of listcontrol derived class. I am supposed to associate a variable of this type with the listctrl on my view form. i.e. I should have the choice of making the variable either of type Clistctrl or Myclistctrl. In the sample project I can do that....both classes show up in CW. I included the .h file of the derived class in my view class. IN my project when I select the listctrl ID_LIST1 in CW, and try to associate it with a m_list, I can only make it of type Clistctrl, and not myCListCtrl. How do I get around this?

Thanks,
ns

Re: class not accessible in class wizard...

Carlos Antollini4-Oct-02 8:53

Carlos Antollini

4-Oct-02 8:53

When I have that problem I delete the clw file and then I call the classwizard. It will ask you the file that you want to add to it....

Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

wow! Thanks!

nss4-Oct-02 9:17

nss

4-Oct-02 9:17

That was great! I was thinking I'd have to mess with messagemaps etc...
Many thanks,
ns

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