C#: Simple and functional way to zoom picturebox images with scroll bars

Is there a simple and functional way to zoom an image in a picturebox including scroll bars? At the moment, I use a picture box in a panel with auto scroll activated. To zoom, I enlarge the picturebox and move it with the scroll bars on the panel. The problem is, that it behaves strange. For example: If you zoom in to far, the margin between the upper and left form border and the image get's bigger and bigger. That's the zooming method. I got it from here. ``` private void ZoomInOut(bool zoom) { //Zoom ratio by which the images will be zoomed by default int zoomRatio = 10; //Set the zoomed width and height int widthZoom = pictureBox_viewer.Width * zoomRatio / 100; int heightZoom = pictureBox_viewer.Height * zoomRatio / 100; //zoom = true --> zoom in //zoom = false --> zoom out if (!zoom) { widthZoom *= -1; heightZoom *= -1; } //Add the width and height to the picture box dimensions pictureBox_viewer.Width += widthZoom; pictureBox_viewer.Height += heightZoom; } ``` Any help is appreciated. Thanks in advance. Marco EDIT: Two screenshots of an unzoomed and a zoomed (16 times) image. Pay attention to the margin between the upper border of the image and the upper border of the form.