how can i make calculator in gwbasic actually m programmer of vb.net bt i dont have any idea about gwbasic plz do help

are you absolutely, irrevocobaly, wihtout-a-doubt sure your professor/company wants this in GWBASIC??? GWBASIC is as using two sticks to make fire, although i do not disparage gwbasic nor disrespect it. it is just VERY OLD. If you really really really need GWBASIC help, and cannot google it for yourself, i'd be glad to help, but i think wire's have got crossed somewheres'. there's a calculator written for visbas that comes with it. if you have vis.bas you should have the calc.bas, calc.frm or calc.vbp which would start that pgm;.