It depends.

You will probably get lucky with some CVS build (Gullikoza or someone else). I am not sure.

[MOVED]

did you check the configuration file of dosbox ?

1#    scaler: Scaler used to enlarge/enhance low resolution modes. If 'forced' is appended,the scaler will be used even if the result might not be desired.
2#            Possible values: none, normal2x, normal3x, advmame2x, advmame3x, advinterp2x, advinterp3x, hq2x, hq3x, 2xsai, super2xsai, supereagle, tv2x, tv3x, rgb2x, rgb3x, scan2x, scan3x

Not sure how to change the configuration. I have gone into dosbox config file but i dont know what to do. Could i change the graphics on willy beamish to super2xsai?

scaler=super2xsai forced

Qbix wrote:

scaler=super2xsai forced

Does this make the gameplay (and the screenshots taken via Dosbox's Screen Capture feature as well) graphics sharper with a higher resolution?

gameplay yes, screenshots no.