Entire screen semi-transparent modal .Net winforms

Have you seen a wb screen that forces the whole page to be disabled so you can click ok/cancel or a similar dialog?  Since popups have been largely eliminated, a floating div has become more common.  I wanted to create this same effect in a Windows form application, and here I will detail the steps [...]

Using the TransparencyKey for irregular shaped .Net Windows Forms

I found most of the documentation on creating winforms with a transparent portion to be out of date and frustrating.  32-bit color depth is probably the most common screen setting these days, and some special steps have to be used to get the old techniques to work.
I will detail the steps I used to get [...]