OpenProcess error 87 invalid parameter

Question

I\'m trying to write a program which executes make.exe from MinGW distribution in the current directory and makes use of its STDOUT data and exit code. I have a handle to proces

Answer 1

Although the post is old: I noticed that I got ERROR_INVALID_PARAMETER when the process existed, but owned by different user and/or Windows desktop and/or terminal server session.

Strange enough, the WTSEnumerateProcess() function does not suffer from this error, but is much more expensive, especially on a system that is already under heavy load with many processes (and a call my even exhaust windows kernel resources).

So, it is not possible to make a 'real' invalid parameter provided and access errors. I would have expected ERROR_ACCESS_DENIED instead (but a task manager invoked as regular/non-elevated user still shows all processes).

Look like some inconsistencies in Windows?