FBStartSession (Function)

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Starting the session
Closing the session
Incompatibility between the IE ActiveX (and oAuth2) and the use .NET assemblies

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See also

FBStartSession (Function)

In french: FBOuvreSession

Used to authenticate and log in to Faceboook.

Example

MySession is fbSession
MySession.AppID = "1702546803104741"
MySession.AppSecret = "badf00ddeadbeefbadc0deoff1ce8ecd"
MySession.Permission = [fbInfoProfile, fbEmail]
IF FBStartSession(MySession) THEN
	Info("Connected")
END

Syntax

Synchronous authentication Hide the details

<Result> = FBStartSession(<Session>)

<Result>: Boolean

True if the connection was established,
False otherwise.

<Session>: fbSession variable

Name of the fbSession variable corresponding to the connection to initialize.

Asynchronous authentication Hide the details

FBStartSession(<Session> , <WLanguage procedure>)

<Session>: fbSession variable

Name of the fbSession variable corresponding to the connection to initialize.

<WLanguage procedure>: Procedure name

Name of the WLanguage procedure ("callback") called during the connection. This procedure has the following format:
<Procedure name>(Connection, Session)
where:
<Connection> is set to:
True if the connection was established,
False otherwise.
<Session> is a variable of type fbSession that corresponds to the initialized connection.

Remarks

Starting the session

FBStartSession authenticates users on a Facebook server. This function initializes the connection with the server and must be called before any interaction with Facebook.
A login window appears automatically.
The FBStartSession function must only be called from the main the thread of the application.

Closing the session

An open Facebook session is persistent: it will remain open:

until the application is closed.
until FBStopSession is called.

Incompatibility between the IE ActiveX (and oAuth2) and the use .NET assemblies

When an HTML control is used in WINDEV, this control uses the "Microsoft Web browser" ActiveX system. ActiveX is also used by WINDEV for all OAuth2 authentications (Facebook, Twitter, Google, etc.) that require a validation for the connection via HTML code.

If you use an HTML control (or OAuth2 authentication) and a ".Net" assembly in the same project, you may encounter a compatibility issue between Microsoft .NET layers and the ActiveX framework.

An API can be used to manage both technologies. To do so, write the following line of code in the initialization code of the project or in the initialization code of a class or global procedure if the ".Net" object is initialized in a class or in a set of procedures:

// Used to manage the cohabitation between IE ActiveX and .NET
API("OLE32", "CoInitializeEx", Null, 2)

Business / UI classification: Business Logic

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