pub struct ID2D1LinearGradientBrushVtbl {
    pub parent: ID2D1BrushVtbl,
    pub SetStartPoint: unsafe extern "system" fn(This: *mut ID2D1LinearGradientBrush, startPoint: D2D1_POINT_2F),
    pub SetEndPoint: unsafe extern "system" fn(This: *mut ID2D1LinearGradientBrush, endPoint: D2D1_POINT_2F),
    pub GetStartPoint: unsafe extern "system" fn(This: *mut ID2D1LinearGradientBrush, ret: *mut D2D1_POINT_2F) -> *mut D2D1_POINT_2F,
    pub GetEndPoint: unsafe extern "system" fn(This: *mut ID2D1LinearGradientBrush, ret: *mut D2D1_POINT_2F) -> *mut D2D1_POINT_2F,
    pub GetGradientStopCollection: unsafe extern "system" fn(This: *mut ID2D1LinearGradientBrush, gradientStopCollection: *mut *mut ID2D1GradientStopCollection),
}Fields
                             | parent |  | 
                             | SetStartPoint |  | 
                             | SetEndPoint |  | 
                             | GetStartPoint |  | 
                             | GetEndPoint |  | 
                             | GetGradientStopCollection |  |