New API (d) FormScreenCaptureMode

[KlausLoeffelmann]

Fixes #13258
Fixes #13450

Microsoft Reviewers: Open in CodeFlow

[hyperquantum]

The difference between HideContent and HideWindow is unclear without looking at their description, and the names seem to differ from their actual meaning:

/// <summary>
///  The form or control appears blacked out in screenshots.
/// </summary>
HideContent = 1,

/// <summary>
///  The form or control appears blurred in screenshots.
/// Requires Windows 10 version 2004 or higher.
/// </summary>
HideWindow = 2

Why not rename them to CoverContent and BlurContent or something similar?

And it may be useful to document what will happen when value 2 is used but the code is run on a system that does not meet the minimum operating system requirement.

[codecov]

Codecov Report

Attention: Patch coverage is 14.10359% with 1078 lines in your changes missing coverage. Please review.

Project coverage is 50.83404%. Comparing base (72ee6eb) to head (191df05).
Report is 7 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (72ee6eb) and HEAD (191df05). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (72ee6eb)	HEAD (191df05)
test	1	0

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #13416          +/-   ##
====================================================
- Coverage   75.43847%   50.83404%   -24.60443%     
====================================================
  Files           3230        2063        -1167     
  Lines         639097      287636      -351461     
  Branches       47289       42054        -5235     
====================================================
- Hits          482125      146217      -335908     
+ Misses        147952      138596        -9356     
+ Partials        9020        2823        -6197     

Flag	Coverage Δ
Debug	50.83404% <14.10359%> (-24.60443%)	⬇️
integration	18.72954% <6.13546%> (?)
production	50.83404% <14.10359%> (+2.42195%)	⬆️
test	?
unit	48.25926% <14.02390%> (-0.15284%)	⬇️

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