BorderWidth
float BorderWidth();
targetFrame.right -= 2 * (int32)decorator->BorderWidth();
targetFrame.bottom -= 2 * (int32)decorator->BorderWidth()
*minWidth += 2 * (int32)decorator->BorderWidth();
*minHeight += 2 * (int32)decorator->BorderWidth()
*maxWidth += 2 * (int32)decorator->BorderWidth();
*maxHeight += 2 * (int32)decorator->BorderWidth()
frame.left -= decorator->BorderWidth();
frame.right += decorator->BorderWidth() + 1;
frame.top -= decorator->BorderWidth() + decorator->TabHeight() + 1;
frame.bottom += decorator->BorderWidth();
&& mousePosition.x <= frame.right + decorator->BorderWidth() +1
&& mousePosition.x >= frame.left + decorator->BorderWidth()) {