C / C++ / MFC Discussion Boards

Michael Dunn15-Sep-02 11:09

15-Sep-02 11:09

Use the TB_ENABLEBUTTON message to enable/disable buttons.

--Mike--
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Re: Disable toolbar button (easy?)

FlyingWren15-Sep-02 15:28

FlyingWren

15-Sep-02 15:28

Aha.

Anyone know offhand the easy way to get a handle to my mainframe's m_wndToolBar so I can send this message?

Re: Disable toolbar button (easy?)

Michael Dunn15-Sep-02 15:58

Michael Dunn

15-Sep-02 15:58

It's kept as m_wndToolbar in your CMainFrame class, however the proper way to disable buttons is to write an UPDATE_COMMAND_UI handler for that particular button's ID. That way MFC will automatically call your handler so you can disable the button (and associated menu item, if there is one).

--Mike--
Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer
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Detecting modal loop

Ravi Bhavnani15-Sep-02 9:59

Ravi Bhavnani

15-Sep-02 9:59

I have a dialog based app, whose main dialog (dlgMain) has 3 buttons: "Exit App" (which exits the app), "Create Modeless Dialog" which creates a modeless dialog (dlgModeless), and "Options", which displays a modal options dialog.

dlgModeless also sports an "Exit App" button. dlgModeless's handler for "Exit App" simply delegates the task to dlgMain by posting it the appropriate WM_COMMAND message.

The user performs the following actions:

Clicks "Create Modeless Dialog" in dlgMain, causing the modeless dialog to appear.
Clicks "Options" in dlgMain, causing the modal Options dialog to appear.
Clicks "Exit" in dlgModeless, causing dlgMain to exit. While exiting, dlgMain properly destroys the modeless dialog.

The problem is the modal "Options" dialog is still hanging around as an orphan window. I need to modify dlgMain's "Exit App" handler to ignore the command if a modal dialog is being displayed.

My question is, how do I detect this without using ugly booleans? I was looking for Afx.../CWnd/Win32 calls to check this, but have come up empty handed.

Thanks,

/ravi

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Re: Detecting modal loop

Michael Dunn15-Sep-02 11:12

Michael Dunn

15-Sep-02 11:12

Two ways come to mind:

Make the modal dialog a member of your app or main frame class, then you can call IsWindow() to tell if the dialog is open.
Call IsWindowEnabled() on your main frame, which will return TRUE if it is disabled because the modal dlg is open.

--Mike--
Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer
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Re: Detecting modal loop

Ravi Bhavnani15-Sep-02 11:42

Ravi Bhavnani

15-Sep-02 11:42

Hi Mike,

Actually the example I gave was a simplistic version of the real problem. In reality, the main dialog can display one of numerous modal dialogs (in response to various commands). I was hoping there would be a generic way to check if a window has a descendant modal dialog in progress.

Your IsWindowEnabled() trick fits the bill poifectly! Now why didn't I think of the obvious? Blush | :O

Many thanks! Rose | [Rose]

/ravi

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

Excel Like Tab

insanely42015-Sep-02 9:09

insanely420

15-Sep-02 9:09

Greetings...

I want a have Excel like flat tab in my application at the bottom of my tab control.

Can somebody suggest me a way or any article on net which tells me how to go through it.

I am not using MFC, only Win32 APIs

Thanks in advance.

Ritesh

Re: Excel Like Tab

JohnnyG15-Sep-02 10:34

JohnnyG

15-Sep-02 10:34

I know this is MFC but the extended styles should apply for MFC and Win32 API. I'm not sure what the Excel like tabs are like but this style makes buttons out of the tabs. Is that what you're looking for?

m_pTabCtrl = new CMyTabCtrl;
CRect cltRect;
GetClientRect(&cltRect); // CRect(0,0, 370, 600)
m_pTabCtrl->Create(WS_CHILD|WS_VISIBLE | TCS_BUTTONS | TCS_FLATBUTTONS, cltRect, this, IDC_TAB1);
DWORD dwExtStyle = m_pTabCtrl->GetExtendedStyle();
m_pTabCtrl->SetExtendedStyle(dwExtStyle | TCS_EX_FLATSEPARATORS);
m_pTabCtrl->ShowWindow(true);
TC_ITEM TabCtrlItem;
TabCtrlItem.mask = TCIF_TEXT;
TabCtrlItem.iImage = -1;
for(i = gSites.size(); i > 0; i--)
{
 TabCtrlItem.pszText = gSites[i-1].GetId();
 m_pTabCtrl->InsertItem( 0, &TabCtrlItem );
}

m_pTabCtrl->SetCurSel(0);

Update MSDAC or JET ???

Hadi Rezaee15-Sep-02 9:00

Hadi Rezaee

15-Sep-02 9:00

Hello there,
I'm writing a database program ...
I used ADO and Microsoft.Jet.OLEDB.4.0 for opening my Access 2000 database ...

I must install Jet 4.0 for using Access 2000 ???
or MSDAC 2.6 ???

I downloaded both of them, but i want to know which of them is neccessery to install for using ADO with Access 2000 ?

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Hadi Rezaie

Re: Update MSDAC or JET ???

Michael P Butler15-Sep-02 9:54

Michael P Butler

15-Sep-02 9:54

MDAC contains all you need for ADO with Access 2000.

Michael

Programming is great. First they pay you to introduce bugs into software. Then they pay you to remove them again.

Re: Update MSDAC or JET ???

Hadi Rezaee15-Sep-02 10:35

Hadi Rezaee

15-Sep-02 10:35

Thanks

Other question about MSDAC, in microsoft data access downloads i saw thease item available for download:

MSDAC 2.7 (it is version that is currently in xp os)
MSDAC 2.6(SP2)
MSDAC 2.5

Some of my users use still Win98, which item is better to update ?
MSDAC 2.7 or MSDAC 2.6 ??

My month article: Game programming by DirectX by Lan Mader.
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Hadi Rezaie

Re: Update MSDAC or JET ???

Pavel Klocek15-Sep-02 19:03

Pavel Klocek

15-Sep-02 19:03

Hadi_Rezaie wrote:
I must install Jet 4.0 for using Access 2000 ???
or MSDAC 2.6 ???
Both of them. The Jet files are not a part of MDAC from version 2.5 (or 2.6?) up.

Pavel
Sonork 100.15206

Re: Update MSDAC or JET ???

Hadi Rezaee16-Sep-02 22:06

Hadi Rezaee

16-Sep-02 22:06

Hello Pavel Big Grin | :-D

Could you tell me what's the reason to update microsoft Jet engine when i installed MDAC 2.6 or later ?

What Jet engine exactly do ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Update MSDAC or JET ???

Pavel Klocek17-Sep-02 6:22

Pavel Klocek

17-Sep-02 6:22

Jet engine is a database engine for mdb files (MS Access uses it).
If you want use mdb/Access database format, you need it. If you are using other database engine (SQL Server or other) you don't need it. MFC CDao???? classes use the Jet engine.

Pavel
Sonork 100.15206

Problem with float ( differnce between float and integer)

CHEICKNA TRAORE15-Sep-02 8:56

CHEICKNA TRAORE

15-Sep-02 8:56

Hi,

Here is code :

CString Valeur="1250.20";
int Fractional = ((atof(Valeur) - atoi(Valeur)) * 100);

Value of Fractional variable after thsi operation is 19 ( False )

I must be 20

Where is my error

Thanks in advance

Re: Problem with float ( differnce between float and integer)

Hadi Rezaee15-Sep-02 9:05

Hadi Rezaee

15-Sep-02 9:05

Hello,
Try this one:

CString Valeur="1250.20";
int Fractional = ((atof(Valeur) - atoi(Valeur)) * 100.0);

change 100 to 100.0

My month article: Game programming by DirectX by Lan Mader.
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Hadi Rezaie

Re: Problem with float ( differnce between float and integer)

Pavel Klocek15-Sep-02 19:06

Pavel Klocek

15-Sep-02 19:06

Result of atof-atoi is converted to int before multiplication.

Pavel
Sonork 100.15206

Getting ADO version !

Hadi Rezaee15-Sep-02 8:44

Hadi Rezaee

15-Sep-02 8:44

Hello there,
How can i get ADO version ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Registering DLLs or ActiveX !!!

Hadi Rezaee15-Sep-02 8:32

Hadi Rezaee

15-Sep-02 8:32

Hello there,
Is there any API function for registering ActiveX or DLLs ??
Or i have to use WinExec to run regsvr32 to regestring ?

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Hadi Rezaie

Re: Registering DLLs or ActiveX !!!

Dave Bryant15-Sep-02 16:09

Dave Bryant

15-Sep-02 16:09

Try something like:

typedef HRESULT (STDAPICALLTYPE *FnDllEntryPoint)(void);

HMODULE hMod = ::LoadLibrary( pszDllName );
if ( hMod != NULL )
{
FnDllEntryPoint lpDllEntryPoint = (FnDllEntryPoint)::GetProcAddress( hMod, "DllRegisterServer" );
if ( lpDllEntryPoint != NULL )
{
if ( SUCCEEDED( (*lpDllEntryPoint)() ) )
{
// Success
}
else
{
// Registration failed
}
}
else
{
// Failed to find entry point - probably not a COM object
}

::FreeLibrary( hMod );
}
else
{
// Failed to load library
}

Dave

Re: Registering DLLs or ActiveX !!!

Hadi Rezaee16-Sep-02 22:09

Hadi Rezaee

16-Sep-02 22:09

That's it

Thanks aloooooot !

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Using Dialog Box in DLL

Atlence15-Sep-02 7:36

Atlence

15-Sep-02 7:36

Hi!

I've created a MFC Dll. I have exported a function which must display a dialog box. I have tried to use the CDialog class but the dialog doesn't appear.
Here a portion of my code(CreatePageDlg is the dialog class of the dialog I want to display):

#include "stdafx.h"
#include "web.h"
#include "CreatePageDlg.h"

__declspec(dllexport) void __cdecl ShowDialog(CString FileName)
{
CCreatePageDlg dlg;
dlg.DoModal ();
if (dlg.DoModal ()==IDOK)
{
}
}

What's wrong.

Thks in advance!
Appstmd

Re: Using Dialog Box in DLL

Michael P Butler15-Sep-02 9:58

Michael P Butler

15-Sep-02 9:58

Have you tried debug stepping into the DoModal function, this should give you more clues to what the problem. Also the sample code provided will show the dialog twice.

Is the DLL's resource identifier range different to the applications's resource id range?

Michael

Programming is great. First they pay you to introduce bugs into software. Then they pay you to remove them again.

Re: Using Dialog Box in DLL

Mike Nordell16-Sep-02 0:24

Mike Nordell

16-Sep-02 0:24

You might have been bitten by MFC dialog creation code that tries to load the resource with the same name or ID from the executable, not from the DLL itself.

You must make your DLL an "MFC extension DLL". How to do this is reasonably well documented in e.g MSDN.

Where can I find the registry key for the path of the current WebBrowser / EmailReader?

Ștefan-Mihai MOGA15-Sep-02 6:14

Ștefan-Mihai MOGA

15-Sep-02 6:14

Where can I find the registry key for the path of the current WebBrowser / EmailReader?
Who can I get/read the icons from these exe-files ?
Please, give me an answer ...

Stefan-Mihai MOGA
info@mogamihai.ro

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