Use this callback to instantiate the GraphicSequencer and register your custom viewport mode or callback.
| 
void <xgs_plugin-item_name>_Init( 
        CRef& in_context,
        LPVOID *in_pUserData 
) {
        ...
}
 | 
<xgs_plugin-item_name> is the name specified in the call to RegisterViewportCallback or RegisterViewportMode, with any spaces converted to underscores.
| Parameter | Type | Description | 
|---|---|---|
| in_context | CRef& | A reference to the GraphicSequencerContext object. | 
| in_pUserData | LPVOID | Pointer to user data. |