How do I scale a picture with a point as the center?

爱情洛丹伦

[Quote=quote from the 9th floor reply:]
I am a newbie to c#, I would like to ask where is the minPanel program on the 9th floor defined? I run the code hint:
"Location.Form1" does not contain the definition of "minPanel", and the extension method "minPanel" that accepts the first parameter of type "Location.Form1" cannot be found (are you missing a using directive or assembly reference?)
"Location.Form1" does not contain the definition of "controlframe", and the extension method "controlframe" that accepts the first parameter of type "Location.Form1" cannot be found (are you missing a using directive or assembly reference?)

whjunesky

1. The picturebox picture property is set to zoom, the picturebox.parent control uses a panel, and the autoscroll property is set to true
2. When the picturebox loads the picture, set the size to image.size
3. When the scroll wheel zooms in, set picturebox.width = picturebox.width*1.1 picturebox.height=picturebox.height*1.1