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Hello
I am working on C++ using Win32 API’s in Visual Studio 2008 environment, and am using almost all standard Windows controls
that’s available.
In the application there’s a Combo box that will show multiple items and have a horizontal and vertical scroll bar.
There is an option for user, by which the user can choose the number of items shown in combo box.
The combo box works fine when there more than 2 items to show, the scroll bars work fine.
But when there’s only one item to show in combo box, the vertical scroll bar is very small. That is, the drop down of the
combo box is not long enough to have a longer vertical scroll bar.
That looks like the standard behavior of Windows combo box. But the application that am working on is
used in a touch screen monitor.
So the problem with a small vertical scroll bar is that, user will not have enough space to touch and scroll.
The issue is more complicated is because, the 1st item in the combo box is always a empty string item. This is to make
sure that there’s no default selection in combo box.
So anyone has any idea how to have a longer drop down for a combo box with fewer items to display?
So that the vertical scroll bar is longer.
Is there a way of overriding Windows Combo box function?
Like doing a SubclassDlgItem() or some other function?
Thanks in advance.
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You need to set the height value of your ComboBox as described in MSDN[^].MVP 2010 - are they mad?
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Are you sure this will fix the problem?
Because i think it will over all increase the height of combo box, rather than increasing the drop down.
Can you please explain?
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Donguy1976 wrote: Are you sure this will fix the problem?
What happens when you try it?MVP 2010 - are they mad?
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So, boost is a great library that has a lot of neat stuff, but I'm looking specifically for a multi-threaded smart pointer implementation, one that can even be as simple (it doesn't need to be blazing fast) as "lock, increment/decrement count, release", which seems like it would be easy to do. Smart pointers can be tricky though, so I'd like to find a good common implementation before giving up and doing something homebrew. Any ideas?
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I'm Hoping someone here can help with a MFC ODBC Consumer Wizard Problem I am having.
Basically I am getting all the way through the various steps and failing on the last 'Finish' step with the Error Message: 'Could Not Create Session On Data Source'
I Know the ODBC Connection definition is working for two reasons:
A) I am able to connect to the database using it with the CDatabase Class in my forms program and select records.
B) The ODBC Consumer Wizard is also initialy able to connect to it as it is giving me a list of tables from which to create the class from during the Select Database Object Step
( Link to pic of Select Database Object step http://tinypic.com/view.php?pic=osx2io&s=6[^] )
So after going through all the steps, Selecting the Orders table, The Wizard fills
The appropiate filename fields as expected and then I press Finish and get the Error:
'Could Not Create Session On Data Source'
(Link to picture of Error http://tinypic.com/view.php?pic=sg3fch&s=6[^] )
This is the really puzzling bit, Because it has already created a session to enable it
to ask what database object I require ?! So why should it fail with that message ?
List of my Setup
VS2008
VC++ MFC Forms program
SQLExpress 2005
Windows Vista
I have managed to get the ODBC Consumer Wizard to work fine with a Text File Driver.
Anyone got any ideas ?
Many many thanks in advance for any help and advice, I'm really stuck on this one.
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Hi there, me again.....
So I got zero answers and the question has dropped to page 15 already.
My Guess is that this problem will not ellicit any help/Suggestions from the knowledgable people on this board.
Seems like 90% of the questions on here get some response, And half of those that
don't are due to total vagueness of question.
So where did I go wrong ?
Is the subject just to obscure ?
Did I paraphrase the problem with insufficient info ?
Or in the infamous words of Ali G "Is it coz I am black ?" ( oh no ! (old) humour )
Anyway, A glass or two of wine later I thought I'd appeal to the old hands on here to
point out to me why I failed to garner any response my little problemette.
3 or 4 glasses later I could ramble on about how simple database access was for a
a C/unix program/platform in the 1990's, all you had to to was EXEC SQL INCLUDE SQLCA and you were away with the pixies 
20 years and several PC's Later, Bill Gates has 'depreciated' Embedded SQL  for VC++
'Progress' is binding your own variables and beating the conection parameters into a
resentful subservience akin to taming a rabid alzheimers afflicted dog apparently.
Excuse me, just venting into the void
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I think in VB one can group bunch of controls and move them as such.
I am struggling with MS SSTab control. I would like to build my tabs as a group and then move them (MoveWindow) into correct place also as a group.
So far I am doing it individually which is a pain.
Actually it would be nice to develop the group as a separate dialog and then "paste" it into correct place at run time.
Any constructive suggestion is as always appreciated.
Thanks
Vaclav
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Hi there,
Have anyone been able to compile this project.
http://www.codeproject.com/KB/cpp/ibuttoninterface.aspx
I tried with no success.
Maybe someone has a working compilation they can send me.
any comments appreciated.
thanks
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He said:
thanks for the link.
modified on Friday, February 5, 2010 4:29 PM
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I tried with VS2010 (the beta one) and got it to compile by changing #define values in stdafx.h :
This is what I use :
#ifndef WINVER // Specifies that the minimum required platform is Windows Vista.
#define WINVER 0x0600 // Change this to the appropriate value to target other versions of Windows.
#endif
#ifndef _WIN32_WINNT // Specifies that the minimum required platform is Windows Vista.
#define _WIN32_WINNT 0x0600 // Change this to the appropriate value to target other versions of Windows.
#endif
#ifndef _WIN32_WINDOWS // Specifies that the minimum required platform is Windows 98.
#define _WIN32_WINDOWS 0x0410 // Change this to the appropriate value to target Windows Me or later.
#endif
#ifndef _WIN32_IE // Specifies that the minimum required platform is Internet Explorer 7.0.
#define _WIN32_IE 0x0700 // Change this to the appropriate value to target other versions of IE.
#endif
it compiles and runs, but there's a "Session" problem.
This signature was proudly tested on animals.
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thank you.
I will try that.
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Can I and if I can do re-direction (>) in Visual Studio Debugging....
Would I type in the Command Line on Property Page e.g myprog.exe > outlist.txt
or Would be in Command Arguments
Thankx
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Yes you can - look at the documentation[^]...
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
CodeProject MVP for 2010 - who'd'a thunk it!
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Or you can just save the Output to a file by highlighting ( giving focus to ) The trace output window
and then use the menu option: File->Save Output As...
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Hi guys .....i dont know hot to fix this error.
when i update my .cpp file using Turbo v3.0(even just adding a variable), a linker error comes displaying.........
Unable to open file..."File Path\File_Name.EXE".
plz help
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No. prog is not running. (well it is running and showing output if i dont modify it, just adding a variable will make it stop, and show the above mentioned liker error)
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Muzammil Saeed wrote: Turbo v3.0
turbo v3.0 what ? if you're talking about Turbo C++[^], I'd ask my boss/teacher/company/school to move in the XXI century and at least get something like the Visual Studio Express.
Anyway, your error usually happens (at least for me) when the output file (in your case, File_Name.EXE) is locked by another process (for example if exe is opened, or previous compiler sessions crashed, ...)
Other than that, maybe check the project settings (if that exists with turbo ) to check the files and paths exist (maybe the compiler/linker is stupid and you manually need to create the folders), or if it's an old version, maybe it does not work with filename longer than 8.3 characters (DOS format).
Good luck.
This signature was proudly tested on animals.
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It is used for educating the students simple c++, oop techniques and i think best in the business.
Anyways,thats right...my previous compiler session carshed. I had to kill the process(turbo c++). How to fix this problum??
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Hello everyone here!!
I have an array of POINTs where X are represented by consecutive integers from 0 to n and Y are represented with RAND values...
So I represent this array on the canvas using PolyLine and I'm trying also to "rescaling" graphic when resizing window but it doesn't work... I have coded the OnPaint procedure like below:
void CMyDLL::OnPaint()
{
CPaintDC dc(this);
dc.SetBkColor(RGB(0,0,0));
CRect rect;
GetClientRect(&rect);
int save = dc.SaveDC();
if(bSetDraw)
{
CMemDC mDC(&dc);
mDC.SetMapMode(MM_ANISOTROPIC);
mDC.SetWindowOrg(rect.BottomRight());
mDC.SetViewportOrg(0, 0);
mDC.SetViewportExt(-1, -1);
mDC.SetWindowExt(1, 1);
if (bActivateGrid)
{
CPen qLinePen(PS_SOLID, 1, RGB(0,139,0));
mDC.SelectObject(&qLinePen);
mDC.MoveTo(1, 0);
mDC.LineTo(rect.Width(), 0);
int height = rect.Height();
int maxlines = height / (int)12.5;
for (int i=1;i<=maxlines;i++){
int y_axis = (int)((double)i * 12.5);
if (y_axis <= rect.Height()) {
mDC.MoveTo(1, y_axis);
mDC.LineTo(rect.Width(), y_axis);
}
}
mDC.MoveTo(0, 0);
mDC.LineTo(0, rect.Height());
int width = rect.Width();
maxlines = width / (int)12.5;
for (int i=1;i<=maxlines;i++){
int x_axis = (int)(((double)i * 12.5) - gridOffset);
if (x_axis <= rect.Width()) {
mDC.MoveTo(x_axis, 1);
mDC.LineTo(x_axis, rect.Height());
}
}
qLinePen.DeleteObject();
}
CPen qPolylinePen(PS_SOLID, 1, RGB(0, 255, 0));
switch (iGraphType)
{
case GRAPH_BARS:
break;
case GRAPH_LINES:
{
if (vtPoints.capacity() == 1)
{
mDC.SelectObject(qPolylinePen);
vectfPoints* pointsline = &vtPoints[0];
mDC.Polyline(&(*pointsline)[0], (int)pointsline->size());
qPolylinePen.DeleteObject();
}
}
break;
default:
break;
}
GDI_FLUSH();
}
dc.RestoreDC(save);
}
Could I have forgot something? Or coded wrong something else in this code?...
Thanks in advance to everyone
Ciao, Luigi
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npuleio wrote: but it doesn't work...
What does it mean, exactly (i.e. please, be specific)?
Moreover, maybe I'm wrong, but I don't see any 'rescaling' in your code.
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
[My articles]
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