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after getting the string i want to compare old and new strings
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Ok, what does your code look like so far?
"Love people and use things, not love things and use people." - Unknown
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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CComboBox::GetLBText
int GetLBText( int nIndex, LPTSTR lpszText ) const;
void GetLBText( int nIndex, CString& rString ) const;
Gets a string from the list box of a combo box. The second form of this member function fills a CString object with the item’s text.
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Hi,
I want to learn DX10 and C++, I know C#, Java etc.
So I also know VS2008 EXPRESS as IDE for C#. But is it as good for C++ as well?
I'd like to know what you think, which IDE is best for developing with C++ and why?
Thx
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as I already said some days ago, real programmers use vi. but it's up to you to use Visual Studio if you feel better with it 
personnaly, I only code C++/MFC, and yes, i code within VS.
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error1408 wrote: But is it as good for C++ as well?
Your kidding right? The editor is VC (Visual C++); an earlier version was Visual C/C++, also call VC. Before that there was the C only environment. The other languages, like C#, where added over time.
So the answer is yes.
error1408 wrote: which IDE is best for developing with C++ and why?
I always end up, eventually, using VC for C/C++. It's what I know best. If you are just learning C++ then you should stick to the IDE you are already use to, because in will reduce the learning curve.
Here are some C++ sites:
http://www.cplusplus.com/[^]
http://www.parashift.com/c++-faq-lite/[^]
http://www.cppreference.com/all_c_functions.html[^]
Good Luck!
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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If you want to use of Directx I suggest use of VC++(on the vista is better ).
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Visual C++ Express Edition is a good choice.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
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Well I haven't used direct x 10 but if its anything like SWING was, then I'd seriously suggest vi (ok, how about gvim) for at least the first rudimentary project. It's not an IDE, you have to use g++ in conjunction w/ it.
I've also heard good things about BBEdit
by the way, how's c# different / what's it good at?
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Ok and why do you think I should use vi, gvim, or BBEdit? What are the special features? Do they provide code completion or sth. like the Intelli-Sense in VS?
C# and other languages[^]
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Any body can help me please..very urgernt
I am new to Device drivers and i have to develop windows usb printer driver for one application.So anybody can help me with revelant documents for studying USB drivers and smaple code for doing this...
Thanks in advance..
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Creating device drivers is not a trivial task. I suggest consulting one of the experts.
"Love people and use things, not love things and use people." - Unknown
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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David is correct in saying that developing a device driver is not a trivial task. If you have to ask such a question then you are -- at this stage -- almost certainly not the man for the job.
Steve
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Hi
I have downloaded Ultimate Toolbox( http://www.codeproject.com/KB/MFC/UltimateToolbox.aspx[^] source code. And i see that for drawing controls, some of controls source code overrode OnDrawItem and put drawing code in there, some of them in OnPaint message handler, some of them both.
How does a control developer make decision when only Onpaint or only Drawitem or both of them must be used? Is this relative to control(for example drawing a custom buton is different combobox or etc.) or relative to drawing style?
Could you please give me some trick?
Thanks...
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For questions related a particular article you should use the comments section at the bottom of the article.
-Saurabh
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This is a general MFC question (could be completly unrelated to Dundas toolbox), so I think this is a valid place to ask.
This signature was proudly tested on animals.
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Some controls do not have the concept of an "item." For example, an edit control does not have a DrawItem message (IIRC), while a ComboBox does.
You may have to handle both because of what you are allowed to touch in each message handler, and because of what "phase" in the drawing process you are at. For example, you may not be able to successfully custom-draw the drop-down button on a combobox during the DrawItem phase -- maybe it gets overwritten/redrawn after that phase completes.
Peace!
-=- James Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles
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James R. Twine wrote: Some controls do not have the concept of an "item." For example, an edit control does not have a DrawItem message (IIRC), while a ComboBox does.
I confused here. Yes some control have concept of an item. Like combobox, Listbox...We can add items(strings, color) to that controls so they have DrawItem virtual method.
But why does CButton class have virtual DrawItem method? What can we add such a control so it has a concept of an "item"?
Thanks for answer.
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Yes, some of the controls do not make sense, Button and Static controls have an item draw message, even though it might not make much sense. Also, lots of virtual functions exist on the CWnd base class that may not apply to all of its derives classes, like CWnd::OnDrawItem.
Peace!
-=- James Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles
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OK.
If i turn back my question in my firstpost: How does a control developer make decision when only Onpaint or only Drawitem or both of them must be used? Is this relative to control(for example drawing a custom buton is different combobox or etc.) or relative to drawing style?
Can we say that:
If a control has owner draw property we must paint items of control in DrawItem method (like this : http://msdn.microsoft.com/en-us/visualc/bb838680.aspx[^]
but if we want draw combobox itself, we must handle that in OnPaint Handler. We mustn't draw items in onpaint if it support ownerdraw ??
I asked this because i am not sure about my logic. Because for example in that application(custom button) http://www.codeproject.com/KB/buttons/roundbuttons.aspx[^]
he made all the drawing in the DrawItem method.
Thanks for help...
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sawerr wrote: some of controls source code overrode OnDrawItem and put drawing code in there
Well OnDrawItem is mainly provdided to facilitate owner drawing controls without sub classing them. An e.g. would be a tab control, we can owner draw a tab control without sub classing it using this function.
Signature of OnDrawItem is as follows, nIDCtl points to the ID of the controls that's meant to owner drawn. So here you will get the id of your tab control and you can owner draw it here.
afx_msg void OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct);
There is another option, that's by subclassing and overriding DrawItem virtual function. Note that DrawItem get's called by OnDrawItem.
Stack trace to DrawItem virtual member function is as follows...
CListBoxEx::DrawItem(tagDRAWITEMSTRUCT * 0x0012f6d4) line 20
CListBox::OnChildNotify(unsigned int 43, unsigned int 1000, long 1242836, long * 0x00000000) line 125
CWnd::SendChildNotifyLastMsg(long * 0x00000000) line 2683
CWnd::ReflectLastMsg(HWND__ * 0x0004089a, long * 0x00000000) line 2721
CWnd::OnDrawItem(int 1000, tagDRAWITEMSTRUCT * 0x0012f6d4) line 1156 + 14 bytes
CLearnDrawingDlg::OnDrawItem(int 1000, tagDRAWITEMSTRUCT * 0x0012f6d4) line 46
CWnd::OnWndMsg(unsigned int 43, unsigned int 1000, long 1242836, long * 0x0012f4f0) line 1930
sawerr wrote: How does a control developer make decision when only Onpaint or only Drawitem or both of them must be used?
DrawItem messages makes things easier for developers, we get OD flags that tells which action requires painting.
For e.g.
ODS_CHECKED
ODS_FOCUS
ODS_DISABLED.
We just have to do the painting stuff. But if we are going via OnPaint then we are on our own, we've got to find out when an item is selected, when it's in focus, when it's disabled based on every paint event that we get. Maybe even scrolling too. So that's for the tough guys. 
So basically for quick and easy painting things we got via OnDrawItem, or DrawItem else for full control we go via OnPaint.
This is my understanding on this topic!
sawerr wrote: downloaded Ultimate Toolbox
I did have the privilege of working on this project with Nishant! Didn't do much development though. My first impression was that it's well written and it works well. It was a great learning experience.
Nibu babu thomas
Microsoft MVP for VC++
Code must be written to be read, not by the compiler, but by another human being.
Programming Blog: http://nibuthomas.wordpress.com
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OK. So Can we say:
"Use OwnerDraw Method when we can, and OnPaint when we have to"?
I think DrawItem MEthod is not only for "items". We can paint/make entire control. Right?
For example we can make elliptic buttons in ownerdraw():
CRect rect = lpDrawItemStruct->rcItem;
dc.Ellipse(rect);
Also we can change the combobox's items drawing style. But can we change style of combobox itself, not only items with only ownerdraw method?Or, If we want this, must we use onpaint handler? I tried this code for listbox:
void CMyListBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
CRect rect = lpDrawItemStruct->rcItem;
CDC dc;
dc.Attach(lpDrawItemStruct->hDC);
dc.Ellipse(&rect);
}
it draws a circle in the listbox, not draw elliptic listbox. But same code makes elliptic button.
IS that a right scenario to see that when we need onpaint and can't be done such a thing with DrawItem Method? We can draw entire button with ownerdraw method, but we can't draw Listbox or combobox with ownerdraw, only it is items?
Thanks for all answers...
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sawerr wrote: I think DrawItem MEthod is not only for "items". We can paint/make entire control. Right?
You are limited in DrawItem function. The point is that it's just a helper function. The master of these functions is OnPaint or WM_PAINT message.
sawerr wrote: For example we can make elliptic buttons in ownerdraw():
CRect rect = lpDrawItemStruct->rcItem;
dc.Ellipse(rect);
You are not free to draw anything anytime in DrawItem functions. There is a rule. You draw based on the flag's that's passed in. So if the flag tells you draw entire client area (ODA_DRAWENTIRE)then go around splashing colors, else if it's just to paint a focus rect (ODA_FOCUS) then you can't do that.
Now you may ask how to know if have to draw a focus rect or remove a focus rect, that's why we have the state flag ODS_FOCUS.
Do the same in OnPaint in and you will what I meant.
sawerr wrote: IS that a right scenario to see that when we need onpaint and can't be done such a thing with DrawItem Method? We can draw entire button with ownerdraw method, but we can't draw Listbox or combobox with ownerdraw, only it is items?
Can you rephrase this question? My brain just fell apart!
Nibu babu thomas
Microsoft MVP for VC++
Code must be written to be read, not by the compiler, but by another human being.
Programming Blog: http://nibuthomas.wordpress.com
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