Zoom in & Out Tool in C#

I want to be able to have two buttons that allow me to zoom in & out on a p开发者_Python百科icturebox image but currently have no code for this. Please Help Me,

Thanks

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Have a look at these:

PictureBox Zoom
A scrollable, zoomable, and scalable picture box

The second one worked great for a project of mine. Codeproject has a few more examples.