[Other Issues]: Investigate use of PInvoked GDI text functionality for performance [and compare with TextRenderer.DrawText (Mode off)]

[Smurf-IV]

Whilst looking into the performance issues from #10, it was found that some developers have been able to improve performance of applications by using the C++ GDI functionality directly, rather than through the multiple layers placed into the .Net abstraction.

from here onwards: #10 (comment)

Here's the modified example to compare like with like:
KThemesTest.zip

Note; In order to compare speed improvements

• Turn CompatibilityMode off (https://stackoverflow.com/a/23230570)
• Use with TextRenderer.DrawText (Mode on and off: Off should be quicker)
• https://stackoverflow.com/a/72720