Function GdipSetAdjustableArrowCapMiddleInset
pub unsafe extern "system" fn GdipSetAdjustableArrowCapMiddleInset(
cap: *mut GpAdjustableArrowCap,
middleinset: f32,
) -> Status
pub unsafe extern "system" fn GdipSetAdjustableArrowCapMiddleInset(
cap: *mut GpAdjustableArrowCap,
middleinset: f32,
) -> Status