Checkboxes in Windows "Dark Mode"
 

I was testing out my NSIS installer, which uses the default NSIS UI, with one of the high contrast themes in Windows to see if it is legible. The dialog was good for the most part with the exception of the check mark, which still used the black color instead of white or yellow. This made it impossible to tell whether a component was on or off. Is there an easy way to detect if a high contrast mode is enabled and modify the color of the check mark or always ensure that a white background is used as the background color for the check box?

You can make a new checkmark bitmap without transparency.