Overlaying bitmap images

[Gizmo001]

How do you overlay one bitmap image over another (e.g., two maps) in VB.Net?

 

[Divil]

If youre using Graphics.DrawImage to draw them, you could use the ImageAttributes class together with a ColorMatrix to give the second one an alpha component of 0.5. That way, youd see right through it to the first.

 

[Gizmo001]

I have used alpha properties to draw over the basemap. However, I am adding other details outside of the basemap region on another bitmap image. Then I would like to overlay the first image over the next. I have to overlay because the first bitmap has the dimensions of the basemap-file (bmp file); and I am unable to change the bitmap size at runtime.

Thanks.

 

[Gizmo001]

Divil:

I was able to merge the two bitmap images with the DrawImage property of graphics objects.