Re: Ask about drawing red point in display window. - C / C++ / MFC Discussion Boards

Rüpel28-Nov-02 22:00

28-Nov-02 22:00

ok. i cross-checked that thing with VS6 and the following turns out:

the VS6-client crashes when using the VS.NET server
the VS.NET-client crashes when using the VS.NET server
the VS6-client works correctly with the VS6 server
the VS.NET-client works correctly with the VS6 server

so i believe there is a bug in the VS.NET automation-server MFC-implementation when using a VARIANT-parameter. and now? how can i report this.
Confused | :confused:

or maybe i made a mistake somewhere, but i don't know where... Unsure | :~

:wq

DrawItem and changing device context?

Kwikkiwak28-Nov-02 0:48

Kwikkiwak

28-Nov-02 0:48

I draw a transparent ownerdraw button.

So I did override OnEraseBkgnd() and draw my stuff in DrawItem(), with strange result. If I use device context from LPDRAWITEMSTRUCT the result is strange... if I use my own DC then all looks fine.

Can someone explain this behaviour to me? Am I doing something terribly wrong or bad? Thanks for help!

void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDIS) 
{
//	CDC* pDC = CDC::FromHandle(lpDIS->hDC);

	CClientDC dc(this); //use my own DC
	CRect rect = lpDIS->rcItem;
	DrawMyGrafic(&rect, &dc);
}

BOOL CMyButton::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

Browser Control

kishore102127-Nov-02 23:55

kishore1021

27-Nov-02 23:55

I am using Web browser control in my program. The control ID is IDC_EXPLORER1. So now i want to hide this control at start up and display it on button click. So to hide , i am using GetDlgItem(IDC_EXPLORER1)->ShowWindow(SW_HIDE); and to show it in button click i am writing GetDlgItem(IDC_EXPLORER1)->ShowWindow(SW_SHOW); When i am using this, i am getting run time errors and the debugger is pointing to ShowWindow function of CWnd. So can anyone tell me how to hide n show this control. I also tried using a member variable for this control n using the function SetVisible of CWebBrowser wrapper class. So Just i wanna know how to show n hide the Web control.

Never postpone today's work for tomorrow

Re: Browser Control

Simon.W28-Nov-02 0:25

Simon.W

28-Nov-02 0:25

give a variable to this control, and VS will create a wrap class for it,then use this variable to ShowWindow

I am seeking...
For what?
Why did you ask me for what? I don't know!

Re: Browser Control

kishore102128-Nov-02 0:33

kishore1021

28-Nov-02 0:33

I have done all that. I assigned a variable with name m_browser. Now in my application am using it. Like m_browser.ShowWindow(SW_SHOW) and m_browser.ShowWindow(SW_HIDE). But it is not working and i have tried for other Microsoft registered active X controls also. It's giving run time error and the debugger is taking me to ShowWindow function.

Never postpone today's work for tomorrow

Re: Browser Control

Phil J Pearson28-Nov-02 0:38

Phil J Pearson

28-Nov-02 0:38

You can use any of those techniques (the control variable is probably best) but you need to make sure the control has been created before you try to send it messages or use its window handle in any other way. You will get run-time errors or asserts if you use any of the wrapper classes on a control with an invalid window handle (such as before the window is created or after it is destroyed).

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Ask about drawing red point in display window.

ooosawaddee327-Nov-02 23:53

ooosawaddee3

27-Nov-02 23:53

If I have these coordinates
(51,74),(98,59),(74,36)

I want to display window. In this window have a rectangle which size is 256x256 and have a black frame. I want to show red point at (51,74),(98,59),(74,36) and if I want to draw black line from (98,59) to (74,36). Do you know how to do that?

Thank you for your reply.

Re: Ask about drawing red point in display window.

Christian Graus28-Nov-02 0:21

Christian Graus

28-Nov-02 0:21

In OnPaint, check out SetPixel, MoveTo and LineTo.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

invisible mfc dialog based application

r i s h a b h s27-Nov-02 23:36

r i s h a b h s

27-Nov-02 23:36

i want to create a dialog based MFC Application which has just one dialog box with->
1) no taskbar icon
2) a system tray icon with a menu
3) no minimize, maximize button on the dialog
how do i go 'bout it?
can any1 help me?

rishabhs

Re: invisible mfc dialog based application

Michael P Butler28-Nov-02 0:28

Michael P Butler

28-Nov-02 0:28

http://www.codeproject.com/shell/trayicons.asp[^]

Michael

Fat bottomed girls
You make the rockin' world go round -- Queen

Re: invisible mfc dialog based application

r i s h a b h s28-Nov-02 1:11

r i s h a b h s

28-Nov-02 1:11

but that has minimize and maximize icons.
also it shows up in the taskbar before being minimized.

how can it stay off taskbar? and remain in system tray.

Re: invisible mfc dialog based application

Ravi Bhavnani28-Nov-02 8:46

Ravi Bhavnani

28-Nov-02 8:46

See this[^] article. Btw, it's impolite to shout. Smile | :)

/ravi

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

Memory Intensive Computations

Haakon S.27-Nov-02 22:52

Haakon S.

27-Nov-02 22:52

With 32 bits adresses the total adress space is 4 GB. From what I've heard Windows reserves 2 GB. It is then useless install more than 2GB RAM. Is there any way around this so you can make use of more than 2GB RAM if necessary?

Regards, Haakon S.

Re: Memory Intensive Computations

markkuk27-Nov-02 23:53

markkuk

27-Nov-02 23:53

Windows can run more than one process simultaneously and each process has its own address space, so Windows can make use of more than 2GB physical RAM.

Re: Memory Intensive Computations

Gary R. Wheeler30-Nov-02 3:16

Gary R. Wheeler

30-Nov-02 3:16

See Microsoft Knowledge Base article Q170756 (sorry I don't have a direct link to it; I found it in my copy of the MSDN). There is a BOOT.INI option to enable 3 GB addressing for user mode programs running under Windows NT Advanced Server and DataCenter Server.

Software Zen: delete this;

About socket input queue.

TianYang27-Nov-02 22:44

TianYang

27-Nov-02 22:44

We must indicate the size of date when using Recevie() function, but how to peek the data size of input queue? sometimes we don't know what size is that current queue head data.

Re: About socket input queue.

Peak28-Nov-02 0:34

Peak

28-Nov-02 0:34

hi
you can use ioctlsocket function to find out how much data is available to read.

dynamic view ,how to deal with it?????

owen_200127-Nov-02 22:26

owen_2001

27-Nov-02 22:26

I split a window into two parts(left and right)using CSplitterWnd .I want to dynamically changing right view. I have a method, but it must destory last view and create the view i want.how can i change the right view and don't destory the view before
thanks!!!!!

How to Merge two floating dialogbar into one floating tabbed dialogbar?

Yu_Matrix27-Nov-02 22:18

Yu_Matrix

27-Nov-02 22:18

helpme!

Thanx!

what's the API for deleting directories?

devvvy27-Nov-02 21:34

devvvy

27-Nov-02 21:34

i tried DeleteFile

it didnt work - perhaps it's just meant for "files" - not directory

norm

Re: what's the API for deleting directories?

berndg27-Nov-02 21:49

berndg

27-Nov-02 21:49

How about ::RemoveDirectory() ?
B.

Re: what's the API for deleting directories?

KarstenK28-Nov-02 0:35

KarstenK

28-Nov-02 0:35

Nice but you must have deleted all files and folders in it.
-> It seems to be a little recursive task. Dead | X|

Try this @ home. (B&B)

Re: what's the API for deleting directories?

Rickard Andersson²⁰28-Nov-02 7:41

Rickard Andersson²⁰

28-Nov-02 7:41

::SHFileOperation() is a good one!

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

CList, POSITION and template pointers

Xavier Shay27-Nov-02 21:23

Xavier Shay

27-Nov-02 21:23

How do you declare a pointer to a template?

I'm trying to make a clone of the CList class, and cannot figure out how they have defined the POSITION type.

in list.h (search for 'clist' in the MSDN library), it is defined thusly:

#define POSITION CNode<type>*

This works for all class methods of my CList and CNode, however when I try and use it in code I get a "TYPE undeclared" error.

Suggestions?
- Xavier

Re: CList, POSITION and template pointers

Alexandru Savescu27-Nov-02 21:25

Alexandru Savescu

27-Nov-02 21:25

I hope I am answering this before CG. Smile | :)

Why do you have to reinvent the wheel? Use std::list

Best regards,
Alexandru Savescu

P.S. Interested in art? Visit this!

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