C / C++ / MFC Discussion Boards

Michael Dunn7-Oct-06 8:02

7-Oct-06 8:02

See the FAQ
7.1 In my MFC program, I'm trying to disable a menu item with EnableMenuItem(), but it doesn't have any effect on the menu. Why?[^]

--Mike--
Visual C++ MVP Cool | :cool:

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Re: gray item in context menu

zon_cpp7-Oct-06 22:02

zon_cpp

7-Oct-06 22:02

thank you, that link is useful for me;) Rose | [Rose]

Zo.Naderi-Iran

What wrong with my code ?

Yanshof6-Oct-06 23:05

Yanshof

6-Oct-06 23:05

Hi ALL

I wrote some code and i dont know why the compiler throw me this error message :

RegistryCall.obj : error LNK2001: unresolved external symbol "private: static class CRegistryCall * CRegistryCall::m_cRegistryCallObject" (?m_cRegistryCallObject@CRegistryCall@@0PAV1@A)

RegistryCall.obj : error LNK2001: unresolved external symbol "private: static bool CRegistryCall::m_bExistObject" (?m_bExistObject@CRegistryCall@@0_NA)

The code :

H file :

class CRegistryCall  <br />
{<br />
private:<br />
	CRegistryCall();<br />
	<br />
public:<br />
	static CRegistryCall* CreateInstance();<br />
	virtual ~CRegistryCall();<br />
	<br />
<br />
private:<br />
	static bool m_bExistObject;<br />
	static CRegistryCall* m_cRegistryCallObject;<br />
};

Cpp File :

CRegistryCall::CRegistryCall()<br />
{<br />
	m_bExistObject = true;<br />
	m_cRegistryCallObject = NULL;<br />
}<br />
<br />
CRegistryCall::~CRegistryCall()<br />
{<br />
	if(m_bExistObject)<br />
	{<br />
		m_bExistObject = false;<br />
		delete m_cRegistryCallObject;<br />
<br />
	}<br />
}<br />
<br />
CRegistryCall* CRegistryCall::CreateInstance()<br />
{<br />
	if(!m_bExistObject)<br />
	{<br />
		m_bExistObject = true;<br />
		m_cRegistryCallObject = new CRegistryCall();<br />
	}<br />
<br />
	return m_cRegistryCallObject;<br />
}

This class need to act as singleTon.

Thanks for any help.

Re: What wrong with my code ?

_AnsHUMAN_ 6-Oct-06 23:19

_AnsHUMAN_

6-Oct-06 23:19

Yanshof wrote:
RegistryCall.obj : error LNK2001: unresolved external symbol "private: static bool CRegistryCall::m_bExistObject" (?m_bExistObject@CRegistryCall@@0_NA)

When you use a static variable in a class you need to initialize it with some value in the .cpp file.(or outside the class) SO for the variables that you are using as static (eg for m_bExistObject) put this line on top of the .cpp file.
bool CRegistryCall::m_bExistObject =true;
and you can do like wise for the other variables too...

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: What wrong with my code ?

raghuji.rao7-Oct-06 1:29

raghuji.rao

7-Oct-06 1:29

if u writing in a console application then in the project-- settings options,
set use mfc in a shared dll option. it will work out

Re: What wrong with my code ?

_AnsHUMAN_ 7-Oct-06 1:48

_AnsHUMAN_

7-Oct-06 1:48

raghuji.rao wrote:
if u writing in a console application then in the project-- settings options,
set use mfc in a shared dll option. it will work out

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: What wrong with my code ?

Hamid_RT7-Oct-06 2:31

Hamid_RT

7-Oct-06 2:31

Yes you need to two lines to your code in cpp file
bool CRegistryCall::m_bExistObject =true;
And also for cRegistryCallObject Smile | :)

WhiteSky

CRichEditCtrl Font related query

harsha_12346-Oct-06 21:54

harsha_1234

6-Oct-06 21:54

hi all,

I have a CRichEditCtrl created on CView derived class.
After Creating the Rich edit control it's default font is something different than what i want. and it's bold also.

so to chnge the font i am selecting all the data present in control and then
applying new font to it.

but when i paste the data that is not compatible with mine font again i need to select all the data and then apply font on it!!

so my question is that is there any way to change the clipboard data's font
so that my control will receive data in compatible font only..

or is there any way that whatever font i want my rich edit control to have
i should tell it before creation as some parameter..(i think this shouls be the way Smile | :)

)
means if i want that my rich edit control should have only this font say "courier new" and it is going to be fix for all it's lifetime then
i should create rich edit that starts with this font only??

if anybody know's please reply..

Thanks and Regards
Harshal shete

Re: CRichEditCtrl Font related query [modified]

Mahesh Kulkarni6-Oct-06 22:40

Mahesh Kulkarni

6-Oct-06 22:40

harsha_1234 wrote:
is there any way that whatever font i want my rich edit control to have

I have solution for this.....
Declare CFont *c; reference in the class .

If you want if for lifetime
you have to add the following code in OnInitDialog where m_pRichEdit is variable of RichEditCtrl ....

	c=new CFont();<br />
	c->CreatePointFont(180,"Monotype Corsiva");<br />
m_pRichEdit.SetEventMask(m_pRichEdit.GetEventMask()                           |ENM_CHANGE);

Then Just make method for RichEditControl Text Change.

Write Following statement in it.
GetDlgItem(IDC_RICHEDIT21)->SetFont(c);

You can take font name as parameter and provide it to the CreatePointFont method of CFont. You will get the desired output.
Hope This will help you.

The secret of life is not enjoyment
but education through experience.
- Swami Vivekananda.

Re: CRichEditCtrl Font related query

harsha_12346-Oct-06 23:15

harsha_1234

6-Oct-06 23:15

Hi i Tried this it is applying the font but the boldness of the font is still there i want to disable the boldness also..

Re: CRichEditCtrl Font related query

Mahesh Kulkarni6-Oct-06 23:26

Mahesh Kulkarni

6-Oct-06 23:26

For more Font Specification you can use the CreatePointFontIndirect() API.
This API uses pointer of the LOGFONT.

The secret of life is not enjoyment
but education through experience.
- Swami Vivekananda.

Re: CRichEditCtrl Font related query

harsha_12347-Oct-06 0:17

harsha_1234

7-Oct-06 0:17

Hey i am sorry,
it's boldness is also disabled now.

but now the only problem i am facing is that whenever i paste
saomething in the control it's font remains same..

so i am thinking of something like this whenever user say's Paste.
i will change clipboeard data's font and boldness as i want.

Is this a good approach???

please Guide me as i am not very much familiar with this control

Thanks and Regards
Harshal

Re: CRichEditCtrl Font related query

Mahesh Kulkarni7-Oct-06 0:49

Mahesh Kulkarni

7-Oct-06 0:49

Create a eventhandler for RicheditCtrl on EN_CHANGE
Write Following statement in it.
GetDlgItem(IDC_RICHEDIT21)->SetFont(c);

This will give the desired output.

The secret of life is not enjoyment
but education through experience.
- Swami Vivekananda.

Re: CRichEditCtrl Font related query

harsha_12347-Oct-06 2:05

harsha_1234

7-Oct-06 2:05

Thank You very much for your help.
it is working very fine.
Thank's.

Re: CRichEditCtrl Font related query

harsha_12347-Oct-06 2:27

harsha_1234

7-Oct-06 2:27

But Apart from this i have another query

i am doing undo redo also.
it is working fine but in undo as well as redo there is one small problem
that whenever i undo/redo then after every undo/redo operation it selects some text and then on next undo/redo it undoes/redoes the character that was typed.

how i can fake the middle selection between two operations??

undo code is like this

if (m_rich.CanUndo())
{
m_rich.Undo();
}

Thanks and regards
Harshal

Detecting Connection Breakdown

vijay_aroli6-Oct-06 21:21

vijay_aroli

6-Oct-06 21:21

Hello everyone. i am trying to upload some Files to an FTP server using CFtpConnection::PutFile() function. Now, how can i detect the loss of FTP connection (if any) while uploading files?? Thanks...

vijay.

Client Window Position

HakunaMatada6-Oct-06 20:46

HakunaMatada

6-Oct-06 20:46

I have a Window which has many client windows. I would like to know the position of all the client windows with respect to the parent window co-ordinates. How do I do it?

I tried using GetWindowRect but it return the rect with respect to the Screen co-ordinates.

---

Hakuna-Matada Beer | [beer]

It means no worries for the rest of your days...
It's our problem free, Philosophy
Jig | [Dance]

Re: Client Window Position

Stephen Hewitt6-Oct-06 20:51

Stephen Hewitt

6-Oct-06 20:51

First use GetWindowRect to get the coordinated in screen coordinates. Then you can use the ScreenToClient to convert then to coordinates relative to the client area of a window you specify.

Steve

Re: Client Window Position

HakunaMatada6-Oct-06 20:55

HakunaMatada

6-Oct-06 20:55

Thanks! Will look into it. Smile | :)

---

Hakuna-Matada Beer | [beer]

It means no worries for the rest of your days...
It's our problem free, Philosophy
Jig | [Dance]

how to show 24 color icon in system tray?

ikohl6-Oct-06 19:49

ikohl

6-Oct-06 19:49

yes, it's easy to show 16 bit color, but when we show 256 or true color icon in system tray, it can't be correctly showen, I have read this article: http://www.codeproject.com/shell/systray24code.asp[^], but sitll can't resolve my problems, you can use visual studio.net's default icon, like the IDR_MAINFRAME, it's a 24 color icon, but cann't correctly show this icon, it seems it's a 16 bit color icon.
Can anybody help me, thanks.

my os is win2000, perhaps 24 color can only be applied in winxp

ikohl6-Oct-06 19:52

ikohl

6-Oct-06 19:52

my os is win2000, perhaps 24 color can only be applied in winxp

it's ok now if download a patch for Explorer.exe, this is the address

ikohl6-Oct-06 20:18

ikohl

6-Oct-06 20:18

http://www.dr-hoiby.com/TrayIconIn256Color/index.php[^]

3D coloured button

sarojkumarjena6-Oct-06 18:14

sarojkumarjena

6-Oct-06 18:14

I want to create a button when I will click that button some action should occur.But it should look like 3D coloured (for example on/off switch of Television)
I am able to put the bitmap on the command button.But the bit map doesnt fit properly.Because command button is rectangle look,but the bit map is oval shape.Any other way to represent

Re: 3D coloured button

Hamid_RT6-Oct-06 19:09

Hamid_RT

6-Oct-06 19:09

Did you see buttons on codeproject?

WhiteSky

How do I use string as a param for CreateWindowEx function

scody6-Oct-06 18:14

scody

6-Oct-06 18:14

Hi all, I am trying to get the string supplied as a param in this function to be displayed as window title when executed but I am gettin compiler error.
here is the code which is causing compiler error

<br />
	hwnd = CreateWindowEx(	NULL,<br />
							"AeroClass",<br />
							"Aerobatics by Scody",<br />
							WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_SYSMENU | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,<br />
							100, 100,<br />
							500, 500,<br />
							NULL,<br />
							NULL,<br />
							hInstance,<br />
							NULL);<br />

and the compiler error is

<br />
c:\visual studio 2005\projects\aerobatics\aerobatics\aerobatics.cpp(132) : error C2440: '=' : cannot convert from 'const char [10]' to 'LPCWSTR'<br />
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast<br />
c:\visual studio 2005\projects\aerobatics\aerobatics\aerobatics.cpp(149) : error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const char [10]' to 'LPCWSTR'<br />
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast<br />

Can anyone please help me in gettin this string displayed on the window title when executed.

Thanks

Scody

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