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Visual Basic and REALbasic
Custom Controls
A lesson and practice session
Issue: 3.1 (September/October 2004)
Author: Owen Yamauchi
Author Bio: Owen Yamauchi is a freelance programmer who has been programming REALbasic since version F4. He is the lead programmer for Domain Softworx, a company that produces developer tools for REALbasic.
Article Description: No description available.
Article Length (in bytes): 6,266
Starting Page Number: 36
RBD Number: 3117
Resource File(s):
3117.sit Updated: Wednesday, September 15, 2004 at 4:27 PM
Related Link(s): None
Known Limitations: None
Excerpt of article text...
News: the recently released REALbasic (RB) 5.5 has a new feature that should be appreciated by Visual Basic (VB) users. Long lines of code can be split using the underscore character, like in VB. That's one less syntax difference to worry about.
If you've ever tried to make a custom control in VB, you've probably been driven insane by how difficult it is. However, there are often times when you want to make custom controls in the course of your development work. Perhaps there's a specific type of WinSock that you want to use in more than one project, or a Text control that behaves differently. As we've covered in a previous column, RB makes these tasks easy to perform with its class and class interface structures.
However, what about another type of custom control: one that does not resemble an existing control at all? VB provides a facility to do this, but it is also maddening. You have to draw the control on a little area like the Form Editor, giving you limited options for what the control can look like. You can make a custom control easily with RB's classes. Since you've never heard of classes unless you've taken an object-oriented programming course, this might seem intimidating at first. In this column, I'll walk you through the process of creating a custom control that allows the user to resize controls by dragging a handle.
...End of Excerpt. Please purchase the magazine to read the full article.
Article copyrighted by REALbasic Developer magazine. All rights reserved.
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