description | ms.assetid | title | ms.topic | ms.date |
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Before working with a database you must first obtain a handle to it. |
53cf73bc-4d52-471c-8384-46d106a36e38 |
Obtaining a Database Handle |
article |
05/31/2018 |
Before working with a database you must first obtain a handle to it.
To access information about an installer database
- Obtain a handle to the database in one of two ways:
- If an installation is in progress, get a handle to the active database by calling the MsiGetActiveDatabase function.
- If an installation is not in progress, open any specified database by calling the MsiOpenDatabase function.
- After the database has been opened, you can call functions to obtain information about the database or to manipulate the database.
- Create a View object and specify a SQL query of the open database by calling the MsiDatabaseOpenView function.
- Obtain a record that contains all primary keys of a specified table in the open database by calling the MsiDatabaseGetPrimaryKeys function.
- Check the current state of an open database by calling the MsiGetDatabaseState function. With the MsiGetDatabaseState function, you can determine the read/write status for a database or if the handle is valid.