[Help!] how to resize pic size in PictureBox Object?

I am using Vb6.0 currently i am doing a floor map program, but my blue print is too big i wanted to resize the actual file when it is loaded into picturebox. How can i do that?

And how can i add a scroll bar function on the picture box? i can add a scroll bar with imagebox but it is too lag thats why i wanted to use picturebox, so that i can edit or draw anything onto the blue print.

anyone know about it? or have done related program before? thanks~~