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c#comregistryprogid

List all available ProgId

I would like to obtain a list, using C#, of all progis's on my computer. I know I can scan the registry, something like this:

var regClis = Registry.ClassesRoot.OpenSubKey("CLSID");
var progs = new List<string>();

foreach (var clsid in regClis.GetSubKeyNames()) {
    var regClsidKey = regClis.OpenSubKey(clsid);
    var ProgID = regClsidKey.OpenSubKey("ProgID");
    var regPath = regClsidKey.OpenSubKey("InprocServer32");

    if (regPath == null)
        regPath = regClsidKey.OpenSubKey("LocalServer32");

    if (regPath != null && ProgID != null) {
        var pid = ProgID.GetValue("");
        var filePath = regPath.GetValue("");
        progs.Add(pid + " -> " + filePath);
        regPath.Close();
    }

    regClsidKey.Close();
}

The code is from this blog.

Does anyone know if there's a simpler way? Also, as far as I understand how this works, the code above would probaly only give me in-process com. What if I need out of process progids as well?

Thanks in advance

Solution

  • This will give you all registered ProgIDs, local or remote (as out-of-proc, not another machine, of course). Besides, the code is just enumerating the registry key, it is simple already.

    If the question is 'is there a specific API for this', there is not one provided by MS. Quite possibly there is some third-party implementation which basically does the same thing as this code.