bmp to dst conversion is mainly related to making Tajima embroidery designs from standard BMP images, something which is not possible with just a simple graphics editor. You will need a specialized program for that due the fact that embroidery design files are special vector based images with instructions for the stitching machine.
However, an experienced graphics designer might be able to create embroidery design from any image with the use of special (and usually expensive) embroidery digitizer software. A lot of embroidery software actually have at least a simple version of such function, but only the really professional ones have the best digitizing functions.Open BMP file Open DST file
An embroidery designs manager
A set of applications used by professional graphic designers
An embroidery app for Illustrator
An embroidery design tool from Janome
An embroidery digitizer