1. The control Panel background is hard coded in windows 10 You can only change the text colors in the section: Change skin colours>Edit windows7/8 part colours>Control panel

2. I'm not sure how you mean "change the shape of the tray menu bar". Can you show what you want it to look like vs how it looks?

3. The arrow itself is controlled by the button text color in the section: Change skin colours>show me the skin defined system colours (drop down menu)>Button text. Be aware that that might change a text color someplace else in your skin which may or may not cause a conflict. The button image underneath the arrow is borrowed from another section (if memory serves it's the toolbar button) The text next to it seems to be hard coded (I have never discovered any way to change it anyway).

4. The taskmanager section is something I've never tweaked, but it seems to match the colors in the section: Change skin colours>Edit windows7/8 part colours>Task manager 2 -win8 (dropdown menu).

5. I'm not sure I understand what you want without context. Do you want no transparency around the image (blank canvas), or none on the frame itself?

6. Sorry I don't have any experience skinning for Chrome because I don't use it personally.

7. Looks like a margin issue. I would try to find a skin with similar scrollbars and copy the settings.

8. The white background is, I believe, the window background color in the section: Change skin colours>show me the skin defined system colours (drop down menu)>Window background. The black part should be the button face color in the same section.

Note, I do get confused sometimes so hopefully someone will correct me if I have made any mistakes.

Yes, I see what section you are talking about now. The menu "flyout" on the expander button is an odd one. The graphics are controlled from the non captioned window edge in the Edit UIS2 frames section. It's a very restrictive section that does not support transparency. Your only option here is a square shape and windows will draw on the stroke and shadows for you.

This is how the section seems to work for me

If I understand you question correctly: The transparency of the window frame is 100% connected to the graphic image used. If you want a solid frame it has to be opaque and not transparent.

I just did a test by doing what you did: change the extension of a file and you are quite correct I got the same white background in the system warning dialog. Strange that it doesn't act like the other dialog boxes in the rest of the system! It must be also hard coded since there is no reason it should be showing white.

Take a look at this post I did a while back on some of the quirky skinning issues in windows 10.

2of3's skinning notes for Win 10 2020

Thanks for your 2of3 answer.

Thanks to your 2of3 answers, I solved problems 2, 3 and 5 too. Currently, issues 1, 2, 3, 4 and 5 have been resolved.

8. I have observed that the problem also occurs when deleting a large file, without throwing it in the trash.

I can't wait to look at the post of 2of3

Thanks Vampothika for your reply.

I checked the number of images and I saw that it is 3 as you said, so there is no error in the number of images. So I could not solve the problem.

I am waiting for solution suggestions for other problems.

Thanks again for your answers.

There is something I want to add. While dealing with these issues, I discovered two more problem.

1) You may know that application windows are grouped when the same application is open more than once. The problem is that the screens that appear when mouseover of this grouping look distorted backgrounds. I could not find how to change this background structure.

2) Another problem is that on the transfer screen that appears during file transfer from one place to another, the background of this screen also appears white, as can be seen in the photo.

I am waiting for your help in this matter too

Scrollbars fixed.  

I noticed another issue but didn't fix it.  Your progress bars  block and border are the wrong way around.

They must be:

horizontal for horizontal.

vertical for vertical.

You can go to the DIAMOND skin for reference and use those skin parts if you are not sure. (we all use diamond when we make a new skin)

Vamps, do you still skin the vert progress bar? I stopped ages ago. I may be wrong, but when was the last time you saw a vertical progress bar in use anywhere?

you need the background, cant have transparent scrollbar.

Same as me (unless I'm doing something "fancy") 

Also if you dont want arrows just do a solid color (the same color as your background color) Make sure you check the glyph section on the scroll arrows. I think diamond has that skinned (I've been saying like forever that sks needs a new skin as a starter. There is so much outdated crap there and who TF would start out a skin with 3 complete substyles!)

Make sense, I did what you said.

If I understood, we have not any solution to white background on some parts of massage or warning screen.

Additionally, I found the solution of grouped apps window.

This mean, we have the last and very important question. 

Google Chrome issue.

I am waiting of your help again. How can I apply theme to Google Chrome?

Thanks again for all.

Thanks.

Actually, I already tried it before prepare this page. However, That does not work at all.

What can I do as different that?

Ok, I did it.