The Open method opens a connection to a data source. When the connection is open, you can execute commands against the data source.
|connectionstring|| Optional. A string value that contains information about the connection.
The string is composed of a series of parameter=value statements separated by semicolons.
Provider= the name of the provider
See the ConnectionString property for details.
|userID||Optional. A String value that contains a user name for the connection|
|password||Optional. A String value that contains a password for the connection|
|options||Optional. A ConnectOptionEnum value that determines whether this method should return after or before the connection is established.|
|adConnectUnspecified||-1||Default. Opens the connection synchronously (after).|
|adAsyncConnect||16||Opens the connection asynchronously (before).|
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