How to use drag bar to switch photo? - compare

I've found this two compare photo as below, does anyone know how to code it with drag bar ? Thank you.enter image description here

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swiftui what is the safe way to put a view on the top of screen?

please check this picture first:
as you see, there are some distance from status bar.
if I want to put the highlight texts to this place,I have to add a fixaul padding to a view,
but if user is using a small screen device, will it out of screen?
is there any safe way to put a text away from status bar?
thanks for your help. have a nice day :)

User changing background image

I will do my very best to explain my issue.
I have 30 images in a gallery giving the user the choice to select an image and change the main view controller background image, much like the Apple wallpapers in the settings menu.
My problem is, I don't know how to implement this.
I though image picker was a solution but as the images are stored inside the app, is this the best?
I have a collection view controller displaying 30 images in cells. Click on the cell and it takes you to selected image in a new vc. How do I have a "Select" button from that image (or the other 29 images) vc to the main vc? Each image vc has a storyboard ID.
I haven't attached code because I haven't written any worth sharing. I'm stuck.
Please be kind to me, I'm just learning in this male dominated world.
Merci beaucoup

How can I add a vertical scroll to the list in Brightscript?

I am trying to customize the video player example that comes with the SDK. I am displaying the videoplayer on the left side of the screen and the playlist on the right side with the navigation through this playlist.
However I am able to display only few videos on the rightside. Hence I need to add scroll to the playlist so that I can display all the videos there.
I have reserched on it and found the rotextscreen that provides scroll but that opens a whole new screen which doesnot serve my purpose as I want to show the playlsit on tthe right side of the player more like you tube.
I cannot use Rogridscreen for the same reason as rotextscreen.
Is there any other component i can use to display the playlist and add the vertical scroll to the playlist or any other approach I can take??
I am a bit lost at the moment. Any suggestions would be really appreciated.
Have a look at roListScreen, a scrollable list will be on the left

Owner drawn taskbar thumbnail preview

Is there a way to draw the taskbar thumbnail preview on my own, instead of letting Windows draw it for me?
What I need is a dynamic thumbnail; for example, let's say I want the thumbnail to be a reverse of the "real" thumbnail. Any way to do that?
Yeah you can do with this method: DwmSetIconicLivePreviewBitmap.
Complete example: http://msdn.microsoft.com/en-us/library/ff819048(v=vs.85).aspx

Selecting an icon from an image grid

I have a grid of icons and I want to select an individual icon and save it in separate image file. The image doesn't need to be processed further just simply split apart. Any thoughts on how to let the computer do this work for me?
For Windows, Bitmap::Clone will do it for you. MSDN Link