In my application, I have a PictureBox that displays a Bitmap that fills the Form. The heightand width of the PictureBox is set to the bounds of the Bitmap so that I can scroll the form to the parts of the image that are off the display area.

The user is supposed to be able to add text fields on top of the image. I want to use labels for this, because the user is also supposed to be able to change the text and move it around on the image. The problem is that I need to make the labels transparent. That's easy enough to do by setting its Color to Transparent and setting the Form's TransparentKey to Color.Control. But when I do that, it doesn't show the Bitmap in the PictureBox where the label's transparency is. Instead, it shows the Form's background color through it.

I need to be able to have the labels sitting on the PictureBox and have the image in the PictureBox show through the label's transparent areas.I can't figure out how to do this.

Can someone give some advice here?