SyntaxEditor has always had the ability to perform "find all" searches programmatically, however we received feedback from numerous customers looking to add this to our EditorSearchView control so that their end users could also access it.
The EditorSearchView control seen above shows the new Find All button visible. Note that it is not visible by default (the new EditorSearchView.IsFindAllButtonVisible property defaults to false) since unlike the other find and replace operations, there is no automatic UI change in the editor itself for a find all operation. Instead, you need to display the results somehow, such as in a find results list.
This screenshot shows an example find results list. The full source code for this sort of setup is included in the samples that come with SyntaxEditor.
Providing the ability for your app's end users to find all instances of search text is certainly a handy addition.