RadForm and Remote Desktop (RDP)

11 posts, 0 answers
  1. renemt
    renemt avatar
    40 posts
    Member since:
    Jul 2007

    Posted 03 Feb 2009 Link to this post

    I'm using RadControls for WinForms 2008.3 1321.

    I built an application, using a RadForm as main form. If I run it on a local computer everything looks good. But if I connect a remote computer via terminal services (remote desktop / RDP protocoll) which is running a "XP based" operating system (e.g. Windows XP oder Windows Server 2003) there is an issue:

    The caption bar of the RadForm won't get drawn correctly. It is invisible, most time completely, sometimes just the left part (the one with the image). But it is there, obviously: if I click on the right place of the "invisible" caption bar I'm able to drag, minimize or close the window although I don't see the system menu buttons nor the whole bar itself. If I move the window outside the visible bounds of the screen and back to screen again the caption bar gets drawn correctly, with all images, titles, buttons and so on. But if I minimize/restore the window after this the drawing problems appear again.

    As I said above the issue seems to occure only on XP based remote systems. On computers running a Vista derivative (like any Vista version or Windows Server 2008) the whole window gets drawn correctly. The problem is also independent from the RDP client. It occures the same if I use a XP station or a Vista station as client, which both have different RDP client versions. The RDP connection settings (as color depht oder performance settings) are also unimportant. Furthermore, only the caption bar of the form is affected but none of its contents (and I use a lot of RadControls in it), including main menu or status bar.

    Can anybody confirm similar issues - and has a solution maybe?

  2. Martin Vasilev
    Martin Vasilev avatar
    1061 posts

    Posted 05 Feb 2009 Link to this post

    Hello renemt,

    Thank you for writing.

    I have to admit that we still experience some visual issues with RadForm and remote desktop scenarios. We will address them in some of the next releases. Currently, you can try to use ShapedForm with TitleBar instead RadForm. Please, excuse us for the inconvenience.

    I have updated your Telerik points for the detailed description.
    Do not hesitate to contact me again if you have other questions.

    Martin Vasilev
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
  3. Hemanth Kumar
    Hemanth Kumar avatar
    2 posts
    Member since:
    Sep 2008

    Posted 19 Mar 2009 Link to this post


    I'm using RadControls for WinForms Q1 2009 (2009.1.9.311) release. Am getting the same issue as described below in the issue except that it is happening on a normal console itself i.e. NOT on remote desktop.

    Wanted to confirm that this issue is still not fixed in the 2009.1.9.311 release and that the same workaround that is listed before in this thread (by Martin Vasilev) still applies. Could you also please provide a code snippet of the workaround if possible.


  4. Martin Vasilev
    Martin Vasilev avatar
    1061 posts

    Posted 20 Mar 2009 Link to this post

    Hi Hemanth Kumar,

    Thank you for the questions.

    Unfortunately, the described issue with RadForm has not been fixed yet. You can try to substitute the RadForm with ShapedForm + RadTitleBar. You can find more details on using this approach in our help section.

    Do not hesitate to contact me again if you have other questions.

    All the best,
    Martin Vasilev
    the Telerik team

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  5. Michael
    Michael avatar
    2 posts
    Member since:
    Aug 2008

    Posted 24 Mar 2009 Link to this post


    I can confirm the same problem -- or more procisely, you're confirming mine...  I posted this the day before (March 19) here: http://www.telerik.com/community/forums/winforms/forms-and-dialogs/title-bar-not-displaying.aspx but have not yet received a response.

    I experience this issue with or WITHOUT RDP.  It happens locally on both XP and on Vista.  It appears to be caused by the entire title bar needing to be redrawn (like clicking on a larger window behind the RadForm), which hides the RadForm (or just the title bar or part of the title bar).  Then if you switch back to the RadForm, the title bar does not redraw.  If I move it partially off-screen and back, it draws that part.

    If I move another window over it and then move that window back off of it, the RadForm redraws correctly, but if I click on the partially obscured radform, it will NOT redraw it's titlebar.

    Again, this is locally, WITHOUT RDP.  It also happens WITH RDP.  It happens in every scenario I've tried.
  6. renemt
    renemt avatar
    40 posts
    Member since:
    Jul 2007

    Posted 25 Mar 2009 Link to this post

    Hi all,

    I just want to tell you that I "downgraded" my application to an ordinary WinForms form. Beside the redrawing problems which several of you can confirm there was a clear performance issue at least when running on Vista. The whole application was somehow slow. For example, if I was clicking on a menu item it lasts about 500msec until reaction. After reverting to the WinForm the GUI performance  considerably improved.

    How pretty and stylish the RadForm ever is - until these problems are solved I won't use it anymore - finally I have to delivery value to the customer and I think he won't be so happy if I say "Look, there are some annoying issues - but doesn't it look pretty cool?" :-)

  7. Mike
    Mike avatar
    640 posts

    Posted 30 Mar 2009 Link to this post

    Hello ReneMT,

    We are sorry to hear you had to downgrade, but  your point is strong. If the issues related to RadForm are unacceptable for you application, you should better wait until we confirm we have managed to resolve them.

    We have already suggested you to try ShapedForm and RadTitleBar instead of RadForm, which would resolve the redrawing issues. Did you try this approach? Please let us know if you have any feedback on this scenario.

    As it comes to the performance issues, we will be very to glad if you can elaborate a bit more, on the exact problems you have noticed. This will help us to further optimize our tools.

    Generally, the flexibility and the unique visual appearance of our controls are based on an especially designed UI architecture which enables our customers to apply a wide range of customizations when using our product. This architecture performs different initializations, such as property registrations, image processing and themes loading which, of course, leads to some performance penalties, but does not affect the overall user experience. This additional logic is not supported by the Standard Windows Forms Controls and thus they do not provide such great extensibility options. Moreover, the Standard Windows Forms Controls are Win32 controls and they are initially loaded when the Operating System starts. Thus, their performance is favored by the Operating System, which is not the case with RadControls for WinForms. I want to assure you that we have always tried to avoid this tradeoff of performance penalties versus visuals and expanded capabilities.

    As you already know, we have all the issues in our todo list and your report is valuable to us since this helps for better issue priority management. We have already resolved some of the issues related to RadForm, as it comes to MDI environment in Q1. However, other issues are more difficult to resolve and require thorough code changes and tests.

    Sincerely yours,

    the Telerik team

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  8. Hannah
    Hannah avatar
    37 posts
    Member since:
    May 2013

    Posted 08 Oct 2016 in reply to Mike Link to this post

    I'm running the latest and greatest version to date, and this issue is still present.  Am I to believe that there is still no fix for this?  I'll have to downgrade to a standard form that I'll color and font-up to be similar if this is the case.

    Font-up, that's a thing, right?



  9. Hristo
    Hristo avatar
    1522 posts

    Posted 10 Oct 2016 Link to this post

    Hello Wayne,

    Thank you for writing.

    Currently, we are not having known issues with RadForm in a Remote Desktop environment. Can you please provide us with details about your local scenario and the experienced incorrect behavior. Please let us know on what machine you connect and if possible also send us a screenshot.

    Looking forward to your reply.

    Hristo Merdjanov
    Telerik by Progress
    Check out the Windows Forms project converter, which aids the conversion process from standard Windows Forms applications written in C# or VB to Telerik UI for WinForms.For more information check out this blog post and share your thoughts.
  10. Angela
    Angela avatar
    1 posts
    Member since:
    Jan 2021

    Posted 04 Jan Link to this post

    Possibly RAD Form is not compatible with Windows XP. Have you checked using 3rd party remote desktop tools like logmein, R-HUB remote support servers etc.? Whether it works or no? Let me know once checked and done.
  11. Dess | Tech Support Engineer, Sr.
    Dess | Tech Support Engineer, Sr.  avatar
    4120 posts

    Posted 05 Jan Link to this post

    Hi, Angela,

    Full system requirements for using the Telerik UI for WinForms suite are listed here: https://www.telerik.com/winforms/tech-sheets/system-requirements 

    Dess | Tech Support Engineer, Sr.
    Progress Telerik

    Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.

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