Support "reg-free" MyServer mode

[forderud]

Motivation: Want to support deployments where MyServer is running in a background service that is auto-started at system bootup.

Tasks:

1. Move TypeLib registration to MyServer startup, so that prior COM registration can be skipped.
2. Add AppID registration and register HKCR\AppID\{APPID}\RunAs = "Interactive User"
3. Call CoInitializeSecurity to allow non-elevated clients to connect. example

Tested configurations

Setup	Non-elevated client	Elevated client
Non-elevated server	TypeLib registration failure (can probably be worked around with RegisterTypeLibForUser)	N/A
Elevated server	CoGetClassObject failure: Class not registered (0x80040154)	Works nicely 👍

Background information

COM security

• Activation (launch) security: https://learn.microsoft.com/en-us/windows/win32/com/turning-off-activation-security
• Call security: Configured with CoInitializeSecurity RPC_C_AUTHN_LEVEL_NONE

Microsoft ATL reference impl

Extract from atlbase.h (with inlining of parameters):

CoRegisterClassObject(*pclsid, p, CLSCTX_LOCAL_SERVER, REGCLS_MULTIPLEUSE | REGCLS_SUSPENDED, &pCache->dwRegister);
...
CoResumeClassObjects();

TypeLib registration

LoadTypeLibEx(tlbPath, REGKIND_REGISTER, ...) seem to fail silently if not running with admin privileges.

Links:

• LoadTypeLibEx
• RegisterTypeLib, RegisterTypeLibForUser

Links

• https://learn.microsoft.com/en-us/windows/win32/com/the-com-elevation-moniker
• CoRegisterClassObject
• https://stackoverflow.com/questions/67296810/coregisterclassobject-acess-class-from-different-integrity-level-or-privileges
• https://stackoverflow.com/questions/36955791/can-i-create-and-use-a-com-class-without-registering-it-in-the-registry

[forderud]

Support for manually started server processes was introduced in 775ed376df895924185386fe18901d3fa307d8de . I think that will be sufficient for this project.