CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com
Results 1 to 15 of 20

Threaded View

  1. #16
    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
    Join Date
    Dec 2012

    Re: error on a code

    Will set EmptyText to all spaces for the required length. As EmptyText is to use with TextOut you don't need a terminating NULL as you specify with TextOut the number of chars to display.
    size_t tlen = p->Text.length();
    char *EmptyText = new char[tlen];
    memset(EmptyText, ' ', tlen);
    However, this is not your problem. The problem you have is that you are writing onto a DC and therefore using the font selected into that DC. On the Console this DC font is NOT the font that the console uses to display console characters (change ' ' in your code to '@' and see what happens!). So if you persist in using gui functions for the console window then you have a whole lot of more work to do. Use the console supplied functions. They are far easier to use.

    The other problem you have is that you assume that each subsequent use of TextOut clears from the screen that which was there before. It doesn't. It writes on top of what was there. So outputing a space over a letter does nothing. Because you haven't selected a correct font to use you only think that TextOut is working properly and the problem is with your EmptyText string. The real problem is with trying to use gui TextOut in the same way as you would output to a console. It doesn't work that way I'm afraid. Once you have your font selected, try outputting a string of A with O as the space character.
    Last edited by 2kaud; October 31st, 2013 at 06:18 PM.
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

    C++17 Compiler: Microsoft VS2017 (15.7.3)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Windows Mobile Development Center

Click Here to Expand Forum to Full Width

On-Demand Webinars (sponsored)

We have made updates to our Privacy Policy to reflect the implementation of the General Data Protection Regulation.