How to change DCOM config identity programmatically

user_1389565 0
Viewed 5568

Is there any way to get the information about Launching identity of DCOM application programmatically. See the picture attached to understand what i mean.

Screenshot with application properties from DCOM Config

I tried to use WMI

ManagementObjectSearcher s = new ManagementObjectSearcher(new ManagementScope(@"\\.\root\cimv2"), new ObjectQuery(
                "select * from Win32_DCOMApplicationSetting  where AppID='{048EB43E-2059-422F-95E0-557DA96038AF}'"))
ManagementObjectCollection dcomSett = s.Get();
var value = dcomSett.Cast<ManagementObject>().ToArray()
             [0].Properties["RunAsUser"].Value;

but "RunAsUser" property was empty. Also tried Interop.COMAdmin

COMAdmin.COMAdminCatalogClass catalog = (COMAdmin.COMAdminCatalogClass)new COMAdmin.COMAdminCatalog();
(COMAdmin.COMAdminCatalogCollection)catalog.GetCollection("Applications")

in this way i managed to get applications which are listed under the "COM+ Applications" node in the "Component Services" snap-in of MMC:

COM+ applications

I'm new in COM, DCOM, COM+ stuff and sure that i missed something important.

After a while i found out why i used to get NULL in the first approach (ManagementObject). You will receive:

  • NULL if identity is currently set to The launching user
  • "Interactive User" in case of "The interactive user"
  • some string with username in case of third option (see the first picture)

But still i need a way to change identity for items like Microsoft PowerPoint Slide under DCOM Config node in MMC.

mmc com+ dcom wmi c#
4 Answers

This is very simple , you can get APPId from 

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{048EB43E-2059-422F-95E0-557DA96038AF}

using 

(RegistryKey dcomPPTIdentity = Registry.LocalMachine.OpenSubKey("Software\\Classes\\AppID\\{048EB43E-2059-422F-95E0-557DA96038AF}"))
{
    if (dcomPPTIdentity != null)
    {
         Registry.SetValue(dcomPPTIdentity.ToString(), "RunAs", "userName");
    }
}
user_133344710
Related