I have an example app on my website that captures a control/window/screen to a bitmap blob so it can be written to a .bmp file or put in the clipboard.
It works great in PB versions 8 through 12.5 but 12.6 and 2017 fail silently. I end up with a valid bitmap that is all white.
This link is to a PB 12.5 app that shows off the problem. It captures a picture control to a blob and then loads the blob into an InkPicture control.
Here is a link to the example app:
I am probably going to submit as a bug to Appeon. If anyone out there can help pinpoint the problem I would appreciate it.