Solved

A bug in CEdit

Posted on 2001-07-17
6
386 Views
Last Modified: 2013-11-20
My App crash whenever I press the "-" button. This button is located on the top right hand corner of a standard keyboard.

I created a CEdit control inside my dialog box with member variable of data type float. However, my app crashes whenever I press "-" button. I tried catching this key using OnKeyDown Event, but it crashes before that.

Anyone any idea?
0
Comment
Question by:KeithTeo
6 Comments
 
LVL 30

Expert Comment

by:Zoppo
ID: 6289244
Hi KeithTeo,

I'm not sure, but I think this maybe a hardware problem: I had same behavior for a long time
in a lot of applications. After my keyboard stopped working I bought a new one and since then
this doesn't happen anymore.

ZOPPO
0
 
LVL 49

Expert Comment

by:DanRollins
ID: 6306937
I assume you are referring to the dash or "minus" key -- it is not the topmost-rightmost key on *my* keyboard.

If the keyboard thinks that the Alt key is pressed, it will try to drop-down the "system control menu" (top right corner of some windows).  See if the problem occurs if you first press and release the ALT key a few times before pressing dash.

-- Dan
0
 

Expert Comment

by:abegnoche
ID: 6313898
I does the same on my computer but *only* when I'm running VC++ 6.0 in debug mode, and it's not a *real* crash, more like an assert (asm int 3), just press F5 to resume, I find it convenient to monitor where your threads are at a specific time...

--
(..alex..)
0
Top 6 Sources for Identifying Threat Actor TTPs

Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

 

Accepted Solution

by:
ocbb earned 50 total points
ID: 6315854
You can intercept the minus key press before it reaches the control by overriding PreTranslateMessage with code similar to the following:


BOOL CMyDlg::PreTranslateMessage(MSG* pMsg)
{
     CEdit* pEdit = (CEdit*)GetDlgItem(IDC_EDITCTRL);
     if(pMsg->message == WM_KEYDOWN &&
                    GetFocus() == pEdit &&
                    pMsg->wParam == VK_SUBTRACT)
     {
          CString text;
          pEdit->GetWindowText(text);
          text += char(45);   //this is the ascii code for '-'
          pEdit->SetWindowText(text);
          //TODO: set the caret position to the last chararcter in the control
          return TRUE;
     }

     return CDialog::PreTranslateMessage(pMsg);
}

I recommend using other valid solutions first, if any.
Errol
0
 
LVL 49

Expert Comment

by:DanRollins
ID: 6317982
hi ocbb,
Please post Comments rather than Answers.  Thanks!

-- Dan
0
 

Expert Comment

by:thazim
ID: 6339357
KeithTeo ,
is the problem with only this '~' Key????
what about other key if u press r u getting the Keyboardevent???
or u try the same program in different machine...

0

Featured Post

Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Introduction: Load and Save to file, Document-View interaction inside the SDI. Continuing from the second article about sudoku.   Open the project in visual studio. From the class view select CSudokuDoc and double click to open the header …
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now