You can finally stop repeatedly coding business logic, data validation, and error handling in each data-aware control. Just specify business logic, data relationships and constraints, and even user interface and data presentation (e.g., color display of data) features as a set of rules at design time with absolutely no code—True DataControl will enforce them at runtime!

True DataControl can be used with Visual Basic® 6.0, Internet Explorer 4 and 5, Visual C++® 6.0, and in any Microsoft® development environment that can bind to an ADO/OLE DB data source.

True DataControl Features

• Filters
  True DataControl supports filter expressions restricting the contents of the data source.
• Control properties
  You can assign formulas to any properties of any controls on the form, even if they are not data-aware. True DataControl will automatically change the property each time the formula changes.
• Field modifications
  True DataControl can recognize changes to fields made by the end-user at the moment a change has been made, so you don’t have to write event procedures for all kinds of controls. No more click events in your code!
• Master-detail relationships
  True DataControl makes it very easy to specify one data source (detail) as dependent on another (master). Master-detail relationships are optimized for the best performance and natively combined with all other True DataControl features.
• Ad-hoc query forms
  True DataControl simplifies the construction of query forms by completely eliminating manual coding and the need for an in-depth understanding of SQL.
• Query mode
  True DataControl brings you the Filter By Form functionality from Microsoft Access, greatly enhanced and much more flexible. You can now do Query By Example in Visual Basic, and without writing any code!
• SQL with parameters
  A limitation of all standard Visual Basic data sources prohibits the use of parameters in the underlying SQL statement at design time. True DataControl remedies this limitation and even allows expressions to be assigned to parameters, so they may be used without any manual coding.
• Calculated fields
  All you need to create a calculated field dependent on the values of other fields is to define a formula. True DataControl will maintain the field’s value and update it automatically.
• Default values
  You can specify the value to be assigned to a field in a new record, and even make it dependent on parameters.
• Calculated Fields
  All you need to create a calculated field dependent on the values of other fields is to define a formula. True DataControl will maintain the field’s value and update it automatically. All you need to create a calculated field dependent on the values of other fields is to define a formula. True DataControl will maintain the field’s value and update it automatically.
• One-to-one links
  In addition to master-detail (one-to-many) relationships, a data source may be placed into one-to-one correspondence with another data source.
• Data in memory
  True DataControl can be used to manage data in memory arrays/variables in exactly the same way as it manages data of a database origin. Just define the fields at design time, and True DataControl will create internal memory storage. This powerful feature enhances all Microsoft and third-party data-aware controls, enabling them to be used in applications and forms that are not necessarily database-related.
• Custom data sources
  As an alternative to database and memory array data sources, you can create customized data sources with event-driven code. This advanced feature is ideal for legacy data and proprietary file formats.
• Excellent documentation
  True DataControl includes an extensive manual and online help with tutorials.
• Responsive technical support
  Free technical support via e-mail, phone, fax, and peer-to-peer newsgroups.
• Free run-time distribution
  No royalty fees required.



• Default values
  You can specify the value to be assigned to a field in a new record and even make it dependent on parameters.
• Field and record constraints
  Validation conditions, or constraints, can be imposed upon individual fields and/or upon the record as a whole. True DataControl will automatically test the constraints when the user changes a field or posts a modified record.

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