Microsoft Access
Code Access Security
Microsoft Access Code Snippets and Other Useful Bits
Overview of Source Code Control Integration Source Code Control Commands in Microsoft Access 97 Changes to Microsoft Access Behavior Objects Microsoft Access Puts Under Source Code Control Limitations of Source Code Control in Microsoft Access 97 Questions and Answers. Because this component writes to the standard source code control interface, ODE Tools users can use any source code control product that supports the interface 1. By integrating source code control into Microsoft Access 97, you can now work with a team of developers to build a Microsoft Access application. The software component communicates with both Microsoft Access 97 and the source code control application. While you work with Microsoft Access 97, the add-in steps in at various points and lets you do things like add, check out, or check in Microsoft Access objects into the source code control project. Source code control integration with Microsoft Access is very similar to source code control integration with Visual Basic. A group of developers work together to build a database application. The "master copies" of all the Microsoft Access database objects are kept in a Visual SourceSafe project. Each developer works on a Microsoft Access database on their hard drive. Checking out objects from the Visual SourceSafe version control system copies them down from Visual SourceSafe into your database. Checking in objects copies them back out from your database into Visual SourceSafe. In other words, this is not a model based on multiple users working together on the same Microsoft Access database at the same time. Checking out an object gives you the ability to make changes to that object. Checking in an object gives other developers the chance to get your changes to that object. When you check out an object no other developer can check out that object until you check it back in. The one exception to this rule is modules. You can check out a module that other developers currently have checked out. When you check the module back in, you can merge the changes that other developers have made to the module since you checked it out. Each Microsoft Access query, form, report, macro, and module is stored as a text file in Visual SourceSafe 2. When you do a "get" or "check out" on one of these objects, the add-in copies the text file from Visual SourceSafe to some temporary location on your machine. Microsoft Access then imports the text file into your Microsoft Access database turning it into a Microsoft Access object query, form, report, macro, or module. Similarly, when you "add" a Microsoft Access object to Visual SourceSafe, Microsoft Access exports the object to a temporary text file and copies that text file into the Visual SourceSafe project. The software component that integrates source code control into Microsoft Access 97 ships in Microsoft Office 97, Developer Edition ODE. Visual SourceSafe does not ship in Microsoft Office 97, Developer Edition. So, in order to get multideveloper support, you need to license Microsoft Office 97, Developer Edition and Visual SourceSafe version 4. When you install the source code control component, it adds the following commands to the Microsoft Access menus:. You use this command to create a new Microsoft Access database from a Visual SourceSafe project that someone else has already created. This is how you enlist yourself in a multideveloper project that someone has already set up. This command brings up a Visual SourceSafe dialog which you use to point to an existing Visual SourceSafe project, and choose the folder to place the new Microsoft Access database. Visual SourceSafe names and creates a new Microsoft Access database in that folder and populates the database with all the Microsoft Access objects in Visual SourceSafe. Finally, it opens the new database exclusively, not shared in Microsoft Access. You use this command to put a Microsoft Access database under source code control. This command brings up a dialog that lets you select the Visual SourceSafe project that you want to put the current database into. It then adds database properties to the Microsoft Access database and to particular Microsoft Access objects to track that the database is under source code control, to track the location of the Visual SourceSafe project for this database, and track versions for particular objects in the database. Next, the add-in brings up the Add Objects dialog that lets you choose what database objects should be added to source code control. By default, all the objects are selected so you just have to click OK to add everything in the database to source code control. When you click OK, Microsoft Access alerts you that it needs to shut down the database and re-open it exclusively. Then all the selected Microsoft Access queries, forms, reports, macros, and modules are written out to text files to a special folder on your machine. Then Microsoft Access checks the text files and the binary file into the Visual SourceSafe project you specified. When the database is closed all the temporary objects in the special folder are deleted. You have now placed your database under source code control. The only visible change is that the icons in the database container for tables, queries, forms, reports, macros, and modules have additional glyphs to indicate that each object is under source code control, checked out to you, or checked out to someone else. These commands all bring up a dialog which contains a list box with all the objects in the Visual SourceSafe project that this command applies to. For instance, if you choose "check in", the list box is filled with all the objects that you have checked out. You check the items you want to carry out the command on and then click OK. Depending on what you had selected before choosing the command, certain items in the list box may already be checked. In the case of "get" and "check out", some objects may appear in the list box which are not actually part of your database. These are objects which other users have put in Visual SourceSafe, which you have not gotten yet 3. When you select "get", "check out", or "undo check out", the object on your machine may be a different version than the object in the source code control project. If so, the objects are synchronized by copying the object from the source code control project to a special folder on your machine and then importing the object into your database, overwriting your version of it. This command displays a dialog with a list of the objects that are currently in your Microsoft Access database but are not under source code control. You use this dialog to add these objects to Visual SourceSafe. The Refresh Object Status command simply refreshes the bitmaps in the database container for the tab you are looking at. All other commands call directly into Visual SourceSafe code. Visual SourceSafe does exactly what it would have done in the Visual SourceSafe user interface. Run SourceSafe runs the Visual SourceSafe Explorer. If Visual SourceSafe is already up, it is brought to the front, not re-launched. Show Differences compares the Microsoft Access local copy of an object to the one in Visual SourceSafe and shows how they differ in a textual display. This command does not work for tables, relationships and the misc. Share Objects takes objects from other Visual SourceSafe projects, shares them into this project, and then gets them into the database. Show History brings up a dialog that lets you show the history of the currently selected object or the history of the entire project. Note that holding down the shift key when selecting this command will enable you to see the history of the entire database not just the selected object. Basically, these just execute the Visual SourceSafe commands. To remove the database from source code control Microsoft Access just removes the Visual SourceSafe properties from the Microsoft Access database. When you open a database that is under source code control, Microsoft Access opens the database exclusively regardless of whether or not the exclusive check box was checked. When you open a database that is under source code control, depending on the source code control option setting for automatically refreshing objects on open, either the objects are automatically refreshed without prompting, or you are prompted if you want to refresh objects. Depending on the source code control option for checking in objects when closing a database, the add-in displays the "Check In" dialog, or prompts you asking if you want to check in the objects that are checked out. The add-in also deletes any temporary text or binary files that it has created. When you open an object in Design view, Microsoft Access checks if the object is checked out to you. If the object is not checked out to any user, the add-in asks if you want to check out the object. If the object is checked out to another user, and the object is a module, the add-in displays an alert telling you another user has the object checked out and gives you the option to also check the module out. Any changes that you and the other user make will need to be merged later using the source code control application. You create and save a new query, form, report, macro or module. Depending on the source code control option for automatically placing an object under source code control, the add-in displays the "Add Files" dialog with just the new item checked, or prompts you asking if you want to place the object under source code control. When you rename an object, the add-in updates the name in the source code control project. The rename fails if the object is checked out by someone else. You must check out the Data and Misc. When you delete an object, depending on the source code control option for automatically deleting an object from the source code control project, the add-in determines if an alert should be displayed asking if you want to delete the object from the source code control database. Objects in italics are not stored in Visual SourceSafe as individual text files but are stored together in one binary file. This section of the document goes through the objects that Microsoft Access puts under source code control and explains any variations from the norm for the particular object. When you put a database under source code control, queries are one of the items that Microsoft Access puts under source code control. Each query is stored as an independent object in Visual SourceSafe allowing you to check out just the query s you want. You can also add a "local" query to your database and later add it to source code control for other developers to use. Like most of the Microsoft Access objects, a query can only be checked out by one user at a time. Queries can be part of non-enforced relationships in the relationship window. When you put your database under source code control, Microsoft Access ignores relationships involving queries. Microsoft Access would have to lump them into the "Data and Misc. This is too restrictive for most Microsoft Access developers. When you design a query, the source code control add-in asks you if you want to check out the query. However, you can change various design properties of a query when you browse it: The changes are not saved when you close the query. You must check out the query manually before browsing it and making design changes. When you put a database under source code control, forms, reports, and macros are items that Microsoft Access puts under source code control. Each form, report or macro is stored as an independent object in Visual SourceSafe allowing you to check out just the form s , report s , or macro s you want. You can also add a "local" form, report, or macro to your database and later add it to source code control for other developers to use. Like most of the Microsoft Access objects, a form, report, or macro can only be checked out by one user at a time. When you put a database under source code control, modules are one of the items that Microsoft Access puts under source code control. Each module is stored as an independent object in Visual SourceSafe allowing you to check out just the modules s you want. You can also add a "local" module to your database and later add it to source code control for other developers to use. Unlike most of the Microsoft Access objects, a module can be checked out by more than one user at a time. This means multiple developers can check out the same module at the same time. Chris can be adding comments to his procedures while Sally adds new procedures to the same module. If Chris checks in his module first, his check in succeeds without incident. Note that by default Visual SourceSafe is set to only allow one user to check out a file at one time. To change this, go into the Visual SourceSafe admin tool and under the Options dialog, check the "Allow Multiple Checkouts" checkbox. When you put a database under source code control, a bunch of database objects are put into the Visual SourceSafe project lumped together inside of a Microsoft Access database, rather than being stored as independent text files. The objects that are lumped into this binary file are:. Only one user can check out the Data and Misc. Objects at one time. As soon as you synch to the version under source code control this local table will be deleted with no warning. There are multiple ways to create a new table: When you try to create a new table, the add-in checks to see if you have the "Data and Misc. If the "Data and Misc. Objects is checked out to you. If it is not, then Microsoft Access gives you an alert: When you create a new table using a make table query, Microsoft Access does nothing to ensure that you have the Data and Misc. This is akin to programmatically creating a table. Objects checked out, the next time you do a get, your new table is deleted. When browsing a table, query, or form you can enter data into tables in the database. Microsoft Access prompts you to check out the Data and Misc. Objects just like it does when you design a table. The "User and Group Permissions" menu item is disabled whenever the active database is under source code control. To add a secured database to source code control, you must have full permissions on all the objects in the database. When you add the database to source code control, the user and group permissions that existed are stripped away. You need to re-apply your security settings after removing the database from source code control. You cannot put any replicated database under source code control. Microsoft Access disables the appropriate source code control commands when the active database is a replicated database. Likewise, when the active database is under source code control, the replication commands are disabled. You can however, import objects into the design master from a database that is under source code control. This allows you to make changes to your database using a database under source code control and then bring those new objects into the design master and replicate them out to other databases in the replica set. If you circumvent source code control in this manner, your changes will be lost when you synchronize that object with the one stored in Visual SourceSafe. This behavior is not recommended. An "enabled" database is a Microsoft Access 2. Microsoft Access cannot put enabled databases under source code control. Microsoft Access disables the appropriate source code control commands when the active database is an enabled database. If you want to move the database to a different location you need to check in all your objects, delete the local database, and then recreate it from Visual SourceSafe in the new location. Why do we store tables, relationships, etc. Tables and relationships are dependent items -- you need to work on them in tandem. If Microsoft Access treats them as independent objects, you can very easily get yourself into a state where your database schema is inconsistent and Microsoft Access has no good way to reconcile the schema. This leads to complex rules for checking in and out tables and relationships. Even with these rules, its trivial to come up with an example where you get your schema in an inconsistent state with no good way to reconcile. Versioning data is made more complex thanks to referential integrity. Microsoft Access would need a set of complex rules for checking out a table. Each additional object tables, relationships, command bars, database props is additional development and test work. By storing all these things in a binary file you get a lot of functionality for a lot less work. What if someone checks out some objects and then they leave on vacation? The "admin" of the Visual SourceSafe project can go to the Visual SourceSafe explorer and uncheck out the items that the vacationing employee forget to check in. This is also the solution to use if a user checks out some objects and then their hard drive crashes or something else awful happens to their machine. Note that if you are using Visual SourceSafe 5. When a Microsoft Access database is added to Visual SourceSafe 5. This setting disables the Check Out, Check In, Undo Check Out, and Get Latest Version commands from the Visual SourceSafe 5. When you try one of those operations, you see an error message:. License one copy of Visual SourceSafe for each developer on your team. If you have five developers, acquire five liceses of the product. Next, run the Visual SourceSafe Admin program from this network location and create your user list for your five developers if you add six names you need to buy another license of the product. Next, each developer connects to the network that Visual SourceSafe is installed on and runs NETSETUP. This installs the client portion of Visual SourceSafe on their machine and points back up to the central database on the network. Otherwise, Microsoft Access will give you an error and none of the source code control commands will be available. Finally, license one copy of Microsoft Office 97, Developer Edition for each developer on your team. Install Microsoft Access and the ODE Tools which both come with this product. Is there any way to programmatically check in or check out objects? The only programmatic control you have is to stop the check out prompt from coming up. If you SetWarnings off before opening an object in design view, Microsoft Access will not prompt you to check the object out. Microsoft Access will just open the object read only in design view so no design changes can be saved. There is no mechanism to programmatically check out an object. Keep in mind that you can use any source code control product that supports the source code control interfaces. Each source code control product has its own features and user interface so the integration with Microsoft Access will differ accordingly. If you want to check in a Word document you can do this through the source code control provider, not through Microsoft Access directly. Products Windows Windows Server System Center Microsoft Edge. Office Office Exchange Server. Resources Channel 9 Video Evaluation Center Learning Resources Microsoft Tech Companion App Microsoft Technical Communities Microsoft Virtual Academy Script Center Server and Tools Blogs TechNet Blogs. TechNet Flash Newsletter TechNet Gallery TechNet Library TechNet Magazine TechNet Wiki Windows Sysinternals Virtual Labs. Solutions Networking Cloud and Datacenter Security Virtualization. Updates Service Packs Security Bulletins Windows Update. 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Maintain Source Code Control in MS Access Source Code Control in MS Access Creating Intranet and Internet Solutions with MS Access Optimizing MS Access 97 Application Performance. MS Access 97 Libraries, Wizards and Add-Ins. Microsoft Outlook Web Access Performance and Extensibility. Controlling Where Office Stores Documents and Templates on a Network. Sharing Files with Previous Versions. MS WordMail 97 White Paper. Collapse the table of content. This documentation is archived and is not being maintained. Source Code Control in MS Access 97 Archived content. No warranty is made as to technical accuracy. Content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. Chris Capossela, Microsoft Corp. See which objects are checked out. Check out an object to control changes to it. Check in an object so other developers can get your changes. View a history of changes for each object or the entire database. Visually compare differences between versions of an object. Version objects and revert to a previous version of an object even deleted objects. Merge differences in different versions of an object. Easily add new developers to your team who sync to the latest versions of all objects. The Basic Model A group of developers work together to build a database application. How are Microsoft Access Database Objects Stored in Visual SourceSafe? What Products Do I Need for this Feature? Is this page helpful? We appreciate your feedback. Site Feedback Site Feedback. Tell us about your experience Flash Newsletter Contact Us Privacy Statement Terms of Use Trademarks.
All Our Microsoft Access Products. Total Visual SourceBook is the most extensive professional source code library for Microsoft Access, Office, VBA, and Visual Basic 6. All the code in Total Visual SourceBook is designed and written specifically for this library. This is not a compilation of mismatched snippets of dubious quality taken from the Internet or code from other projects dumped into this. The code in Total Visual SourceBook is written for the needs of a developer using a source code library covering the many challenges you face. The code has a consistent programming style, naming convention, and comments. Every major area of software development is covered. You can treat our code as a black box and simply insert it into your projects and call it. Or you can learn from our techniques by examining it line by line. Countless developers over the years have told us they learned some or much of their development skills and tricks from our code. Total Visual SourceBook has one of the highest return on investments of all our products. Subject to the licensing terms , you can include our code in any or all of your projects Royalty Free. Even if you are an experienced developer, there are probably several classes and modules which are new to you. All it takes is a few to solve some critical problems to pay for the entire product. You can then treat the rest of the code as "free". You only need to add one object to your project to solve a task without a bunch of dependencies. This lets you choose only what you need and remain productive. All the procedures include basic error handling. If you have your own error handling structure, our Code Explorer lets you easily replace ours with yours. Total Visual SourceBook is integrated with your VB6 and VBA IDE. Start it as an add-in and its always ready to insert code directly into your project, or import your code into the powerful Code Repository to share with your team. The Code Explorer is designed to make it easy for you to find and insert the code in Total Visual SourceBook into your project. To see how intuitive and powerful it is, read our Overview and Screenshots page. Use the Total Visual SourceBook Repository to store, index, and manage all your code in a shared environment. Leverage your existing work by having your experienced developers store their custom code in the code repository for everyone to share. It tracks author, creation and modification dates, comments, examples, and more. The repository makes it easy to search and find the code you need. Eliminate the chance that people spend countless hours writing work that already exists and is tested and better! The Total Visual SourceBook version remains available and part of the Suites. Note the Visual Basic 6 specific code is only bit compatible since VB6 does not have a bit version. Vienna, Virginia Privacy Policy Webmaster. Check for Updates License Terms. Supports Microsoft Office, Access, Excel , and New Features: All the code is well tested and documented so you can use it immediately and with confidence. Extensive Code Breadth Every major area of software development is covered. Designed for the Needs of Developers Use it, Learn from it, Customize it You can treat our code as a black box and simply insert it into your projects and call it. Customizable Error Handling All the procedures include basic error handling. Total Visual SourceBook Code Explorer Direct Integration with the Integrated Development Environment IDE Total Visual SourceBook is integrated with your VB6 and VBA IDE. The add-in can only run within the bit version of the IDE. If you are using the bit version of Office, Total Visual SourceBook still works on its own, but not within your IDE. Licensing Information Total Visual SourceBook is licensed on a per developer basis. Each developer who runs the program and uses the code must have a license. Read the License Agreement for details. Contact Us Non-Technical Questions Location and Directions International Dealers My FMS. About Us About Us Recent News Why Choose FMS? Also Available as part of: Total Access Ultimate Suite Total Access Developer Suite. Total Visual Developer Suite Total VB Enterprise Suite. Microsoft Office , and are available in 32 and bit versions. Integration with the Module Code Editor IDE. Source code library material is redistributable royalty-free as long as it is contained in an application that is compiled and the Total Visual SourceBook library code is not redistributed in a readable form. Total Visual SourceBook is licensed on a per developer basis.
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