Faster Picturebox loading or alternatives

So, ok let's start it!

Preparation:

declare these two variables above public form1()
        Bitmap bitmap,img;
        Graphics bmpgraphic;

First of all you need a background worker. (find it in the toolbox)
got into the "go_work" method
and make something like this.

            bitmap = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format64bppPArgb); // Where w is your width for all your images! Also the height.
            bmpgrafik = Graphics.FromImage(bitmap); // This is the connection between the Graphic and the Bitmap! Very important

            bmpgraphic.CompositingMode = CompositingMode.SourceCopy;
            bmpgraphic.CompositingQuality = CompositingQuality.GammaCorrected;

now paint all your images on this bmpgraphic
something like this

for(i = 0; i < imagecount; i++)
{
        //set actual image
         img = new Bitmap("imagepath");
        bmpgraphic.DrawImage(img,Point); //Point is where the picture is drawn in the box. You must change it wit every i
}

When everything is drawn virtual on your bitmap throught the bmpgraphic go into the
RunWorkerCompleted method
and make something like this

picturebox.Image = bitmap;
and then
bitmap.Dispose(); // Cleaning up the cache

So everytime you want to redraw this image (resize, picture changed etc.)
then you have to call this

            if(!backgroundworker.IsBusy) // Just to get sure the backgroundworker is ready
            backgroundworker.RunWorkerAsync(); // redraw everything

So now your image should or can be painted :D

Now you can check the xy coordinates with the mouse moove method throught your picturebox and check it with the positions from your little pictures.
(You have to save every point to every image so you can check them)

Hope I forgot nothing. And good luck!