hi,I want to convert bmp images into jpg ,But I have no ideal ?could you give me some opinions ,or give me a example ? Thanks! No pians ,No gains!

Thanks .But I must realsize it by a programme. No pians ,No gains!

I get bmp iamges from camera ,They are too big to Transport on the internet. So I want to convert them to jpg ? But I have no ideal ,Give me a hand! Thanks! No pians ,No gains!