Error Creating Form Cannot Inherit From Form
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How do I use or resolve issues with visual form inheritance in Delphi? up vote 11 down vote favorite 7 I've been working on a project in Delphi 7 where I wanted to have forms inherit components from other forms. I was able to get this working, but came across the following issues (and I'm going to post the solutions to hopefully help others in the future): In the .pas file of a form, I would change the form to inherit from some other form, but it wouldn't get the components from the ancestor form. For certain descendant forms, I would get the following error message when opening the form at design time: "Error creating form: Ancestor for 'TAncestorForm' not found." I would have to first manually open the ancestor form, and then I could open the descendant form. delphi inheritance share|improve this question asked Oct 10 '08 at 8:20 Liron Yahdav 2,80332455 add a comment| 2 Answers 2 active oldest votes up vote 25 down vote accepted First, for those who don't know how to inherit a form visually, you create the ancestor form as usual. Then go to File > New > Other. Select the tab with the name of the current project, and choose the form you want to inherit from. If you want to inherit from a form that's not part of the current project, open that form, right click it, and choose Add to Repository. Then you will be able to go to File > New > Other and select that form from the appropriate tab. Given that, I came across issues because some of the descendant forms were already created, so I couldn't follow the process above. Also, I made some changes to forms from the standard code Delphi creates. I was able to resolve all issues with visual form inheritance using the following guidelines: The .pas file of the descendant form must
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property? Subject: Problem inheriting from a form...blank name property? Posted by: Phil Wright Date: Mon, 16 Jul 2012 Hi all, I have an error with a form I am trying to inherit from that is giving me a really weird error that I have not seen before: Error creating form: Cannot inherit from form