![]() ![]() A list of different handlers can be found here. Even image/video thumbnails are generated by shell extension handlers (DLLs). :) As for your second question about whether extensions have "less importance" now and lack "any influence in context menu", I don't understand what you mean. So disable these options only if you reallyĮxperience delays when right clicking ".exe" files. You will not see all SFX related context menu items when rightĬlicking SFX archive. This group of options allows to enable orĭisable SFX processing for local hard disks, network disks and otherĭisks like CD-ROM and USB separately. Is negligible for fast local hard drives, it can be noticeable in case Read and analyze file data to find out if it is SFX. ![]() Checking contents of executable file andĭetecting if it is a self-extracting (SFX) archive introduces someĭelay when right clicking every ".exe" file, because WinRAR needs to "Where to check for SFX archives" options control processing of SFXĪrchives in context menus. ![]() Here's what the help file has to say about it: This prompts it to add various context menu entries such as Open with WinRAR, Extract with WinRAR and so on, which don't get added for "normal" EXEs.įurthermore, in WinRAR's Settings dialog there's an option titled Where to check for SFX archives: (The process name is displayed as explorer.exe and not rarext.dll, because the context menu handler is an "in-process" COM object that the shell loads directly into explorer.exe's memory space for execution.)Īs you can see, it reads the first 7 bytes to confirm that it's an EXE:Īfter reading more data (no doubt to obtain and parse the header), it then reads 7 bytes from offset 101,376 to confirm that it's a WinRAR SFX and not just any old EXE: Its creation date, its size, or its read-only status) and base theįinally, if you want proof that the file is actually being read by WinRAR's shell extension DLL (since you seem to doubt it), here are the various ReadFile calls registered by Process Monitor on simply right-clicking a WinRAR SFX: Or you could examine some other attribute of the file (such as ![]() The file, retrieve information, and base the menu item on actualĭata. In addition to the number of files selected, you would alsoĪlready know the filenames in question. You also have the ability to base the menu item on the file Since the number of files selectedĬan be determined in IShellExtInit::Initialize, this becomes a trivial You might want different menu items displayed based on whether one or Is where dynamic context menus come into play. If you need different processing options based on the state of theįile itself? There are also situations where you might need oneĬontext menu for a group of files and another for a single file. What if you need to process 20 files? What Processed through a static menu is limited by the program that is used Static context menus are limited because they are the same for everyįile object of a given type. Quoting from this Visual Basic Shell Programming book excerpt: If you're interested in delving into it further, I advise you to read the Shortcut (Context) Menus and Shortcut Menu Handlers article, especially Choosing a Static or Dynamic Shortcut Menu Method and Customizing a Shortcut Menu Using Dynamic Verbs. Windows context menu handlers can be both static as well as dynamic. ![]()
0 Comments
Leave a Reply. |