IPreviewHandler::Unload method (shobjidl_core.h)

Directs the preview handler to cease rendering a preview and to release all resources that have been allocated based on the item passed in during the initialization.

Syntax

HRESULT Unload();

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

When called, the preview window will be destroyed.

This method should be called only after Initialize, Initialize, or Initialize has been called. All resources associated with this initialization will be released. Prior to calling IPreviewHandler::DoPreview, this preview handler will be re-initialized with a call to one of the initialization interfaces and a call to IPreviewHandler::SetWindow.

Requirements