My gay-and-in-ministry questions?

DISCLAIMER: I'm not gay. And I'm no longer in vocational ministry.

I wonder, for those who are gay, or... if you view sexuality as fluid... become/come out as gay during their ministry tenure, how does the situation work?

I'll admit, a large slice of the answer depends on your denominations stance on homosexuality and/or gay marriage. But, if your church is, at least, open to the possibility of gay ministry agents, how is the situation handled?

Do you volunteer the information during your initial interview?
Do you tell someone when they offer you the position?
Do you only mention your sexual preference to the senior minister?
Is the information open to only those in leadership positions such as fellow staff members or the church council?
If you're in a youth ministry context, do you tell your leadership team? 
If so, when do you tell new recruits?

Is the equation changed if you're in a relationship?
Do you mention your partner up the front of church, or if you do, are they gender neutral?

What happens if your relationship progresses towards, if your civil laws allow, marriage?
With your relationship inevitably becoming public, if not already, are you forced to announce your status? 
Is the engagement announcement to your partner considered too late for some? 
Do you even announce the engagement before the church like many heterosexual couples would?

What happens if someone comes out/begins to identify as gay whilst in a ministry placement?
Do they need to announce it?
Again, if so, who does it need to be told to and when?

I imagine these, and many, many, other questions restrict a lot of gay Christians from entering ministry.

As a heterosexual, these are questions which I don't even need to, really, wrestle with.