External Interfaces/API

Releasing COM Interfaces and Objects

Use these MATLAB functions to release or delete a COM object or interface.

Function	Description
delete	Delete a COM object or interface
release	Release a COM object or interface

When each interface is no longer needed, use the release function to release the interface and reclaim the memory used by it. When the entire control or server is no longer needed, use the delete function to delete it. Alternatively, you can use the delete function on any valid interface. All interfaces for that object are automatically released and the server or control itself is deleted.

Note    In versions of MATLAB earlier than 6.5, failure to explicitly release interface handles or delete the control or server often results in a memory leak. This is true even if the variable representing the interface or COM object has been reassigned. In MATLAB 6.5 and later, the control or server, along with all interfaces to it, is destroyed on reassignment of the variable or when the variable representing a COM object or interface goes out of scope.

MATLAB automatically releases all interfaces for a control when the figure window that contains that control is deleted or closed. MATLAB also automatically releases all handles for an Automation server when MATLAB is shut down.

Saving Your Work

Writing Event Handlers