Detecting whether the computer is a Domain Controller

Question

How do I get information whether the system is configured as domain controller or not programatically on windows.

Answer 1

You can avoid the HKLM read, GetVersionEx's OSVERSIONINFOEX.wProductType will equal VER_NT_DOMAIN_CONTROLLER

Answer 2

Examine the registry key HKLM\SYSTEM\CurrentControlSet\Control\ProductOptions\ProductType. A domain controller will have the value LanmanNT. LINK