Disable the blue highlighting for tabs?

BlitzPlus Forums/BlitzPlus Programming/Disable the blue highlighting for tabs?

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I tryed that but couldn't get it to work. Both of these fail:

GetWindowLong(hWnd, GWL_STYLE) And Not TCS_HOTTRACK
GetWindowLong(hWnd, GWL_STYLE) And (Not TCS_HOTTRACK)

How should I do it?

* Edit * Ok, cool :)