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Overriding WndProc in custom TextBox Messages   Related Types This message was discovered on microsoft.public.dotnet.framework.compactframework. Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions. Post a new message to this list... PeterB Hi! I'm trying to override WndProc( ref Message m) in my custom TextBox control. Unfortunately it seems like the System.Windows.Forms.Message class is not available in CF. Is there a was to reference this class anyway? I tried referencing Microsoft.WindowsCE.Forms but I get the following compile error: WndProc(ref Microsoft.WindowsCE.Forms.Message)': no suitable method found to override I am not sure whether it is impossible to override the WndProc method in this context or if I'm just using the wrong Message definition. Ideas? Thanks! / Peter Reply to this message...        Peter Foot [MVP] (VIP) You cannot override the WndProc in the Compact Framework. You can use the Smart Device Framework ApplicationEx object to implement an IMessageFilter to capture incoming windows messages for your application. www.opennetcf.org/sdf/ Peter -- Peter Foot Windows Embedded MVP www.inthehand.com | www.opennetcf.org Do have an opinion on the effectiveness of Microsoft Windows Mobile and Embedded newsgroups? Let us know! https://www.windowsembeddedeval.com/community/newsgroups "PeterB" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        PeterB Well... it's not an application, so using ApplicationEx (which is a great asset though) is not an option :-) What I want to do is capture the WM_PASTE message to prevent pasting to the textbox, any suggestions on how this could be done without overriding WndProc? regards, Peter "Peter Foot [MVP]" <Click here to reveal e-mail address> skrev i meddelandet news:%23%Click here to reveal e-mail address... [Original message clipped] Reply to this message...        Paul G. Tobey [eMVP] Your code is not an application? Are you building a library for other applications to use? Paul T. "PeterB" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        PeterB I am creating a custom TextBox Control, so yes I am making a library of custom controls for our company :-) So I want to handle the paste functionality within the TextBox control to prevent it from happening. Is this possible without WndProc? / Peter "Paul G. Tobey [eMVP]" <ptobey no spam AT no instrument no spam DOT com> skrev i meddelandet news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        Paul G. Tobey [eMVP] I don't see any way to do it without subclassing the control, no. Paul T. "PeterB" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        PeterB Paul, I am not sure I understand you correct here, I am subclassing the TextBox class into my own TextBoxInt class. I am overriding the KeyPress method to make sure only valid characters are entered. However, the user can still copy/paste illegal characters into the TextBoxInt, which is why I need to prevent that functionality (or handle it in some way). But as WndProc isn't available it seems hard to intercept any pasting into the custom TextBoxInt control. A workaround, which is very ugly, is to override the TextChange event and validate the text when it changes. In this way it is possible to catch a paste and if the new text is invalid, fix the text back to the previous state (which was valid). thanks, Peter "Paul G. Tobey [eMVP]" <ptobey no spam AT no instrument no spam DOT com> skrev i meddelandet news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        Chris Tacke, eMVP Yep. and unfortunately I don't think there's much option other than your workaround. Without function pointer support, you're kinda stuck. -Chris "PeterB" <Click here to reveal e-mail address> wrote in message news:eRt47t%Click here to reveal e-mail address... [Original message clipped] Reply to this message...        PeterB Ok, thanks for the help guys! Would it be possible to make the textchange event occur before the actual re-painting of the textbox. What I want to achieve is to remove the flashing, non-wanted characters from the paste. Also, sometimes I add special characters (for example hyphen/minus sign to make the number in the textbox negative), the cursor is then moved to one position and then back to the original position. Would it be possible to prevent this flashing as well? / Peter "Chris Tacke, eMVP" <ctacke[at]OpenNETCF_dot_org> skrev i meddelandet news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        Chris Tacke, eMVP Override OnPaint and use a synchronization object like a Monitor wait or some such to serialize the repaint after you handle the textchange. -Chris "PeterB" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        PeterB Thanks for the idea Chris, however, it seems like you can't override OnPaint for a custom control inherited from TextBox :-( If I look at your TextBoxEx, it does inherit from TextBox and override OnPaint but for design support (or do I misunderstand the code?). Anyway, I can't get OnPaint to fire in my own code. I guess I could inherit from Control class instead but I get the impression this would demand a lot of extra work. I'm having a look at that right now.. / Peter "Chris Tacke, eMVP" <ctacke[at]OpenNETCF_dot_org> skrev i meddelandet news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        Chris Tacke, eMVP You're probably right. There are definitely a few things with Controls I'd change if I had my way. -Chris "PeterB" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... > Thanks for the idea Chris, however, it seems like you can't override OnPaint [Original message clipped] Reply to this message...     System.Web.UI.MobileControls.TextBox System.Web.UI.WebControls.TextBox System.Windows.Forms.IMessageFilter System.Windows.Forms.Message System.Windows.Forms.TextBox Ad MBR BootFX Best-of-breed application framework for .NET projects, developed by Matthew Baxter-Reynolds and MBR IT

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