"Replace in Files" file modification/save event for Documents not opened in Visual Studio

Hi,

As part of our Visual Studio plugin, we would like to take some actions (e.g. SCC check-out, etc.) upon files modification.

Whereas it is working fine for Documents already opened in the Editor (via TextEditorEvents.LineChanged, TextDocumentKeyPressEvents.BeforeKeyPress or even IVsRunningDocTableEvents3), I cannot figure out how to do the same for the ones which are not e.g. When executing "Replace in Files", on a Project or Solution, we would like to check-out (via Perforce)  the resulting files before being automatically saved by Visual Studio.

Thanks,

Manu.