Alternative Scrollbar Style for whole Solution if Touch-Screen attached

See more:

C#

XAML

WPF

Scrollbar

style

Hello,

I Need an alternative Scrollbar Style for my whole Application when Touch Displays are attached (then the scrollbar is larger).

I check if there is any touch attached in code behind:

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
static extern int GetSystemMetrics(int nIndex);

const int SM_MAXIMUMTOUCHES = 95;

static readonly bool isTouchAttached = GetSystemMetrics(SM_MAXIMUMTOUCHES) 

Then I planned to create an attachedproperty in my scrollbarbar style with Inherits but I am not allowed to because of possible Performance issues.

We got a Scrollbar Style in our solution which is appearing in a XAML in a MergedDictionary for all our controls without a code behind.

Any idea how I can use a 2nd aternative style for the General scrollbar style and Switch somehow for using that one?

Are there any best practices or something for a case like this?

Thanks a lot!

Eric