It's all controlled in by the registry in the .tsk. I usually just edit classicblue.tsk from the SYS I'm upgrading to. Open the .tsk with WinCE cab manager and go to the registry portion. Navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Color. You will see ThemeColors and ThemeValues. ThemeColors tells if a color is on or off I think. I do not edit this. In ThemeValues, you see something like below:
Code:
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,FF,FF,FF,00,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,FF,FF,FF,00,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,2D,5E,CF,00,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00
The bolded portion (2D,5E,CF towards the end) is the highlight color in Hexdecimal RGB Value. You can google converters fro RGB-Hex. That is the only thing I change in all of that, though I'm sure you can do more with it. If you want to just edit the classic blue.tsk, you can just search the sys for classic blue and edit all of the .png's. If you want to make your own theme, you can save them as a different file name and edit the new .tsk registry accordingly at HKEY_CURRENT_USER\Software\Microsoft\Today. There are a lot of entries, so I just change the classic blue png's and save them.
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. This is for WM6.5 and I have not tried it for 6.5.1. It is also for wvga, so a few of the .pngs may need to be resized (mainly the background will get cut off because of the vertical size difference between vga and wvga).