maths program to test my kids help please

Hi im new to Vb and am trying to develop a program to test my childrens maths...

The functions i want to test is + - x / ,... i also want to add threee levels of difficulty to it ....

I have made it to create 2 random numbers ..then my child enters the answer .. with a resulting pop up box saying correct or incorrect..

I would also like to run a running total of their scores so if they get three wrong out of ten it will say 7/10

I have tried to do this but am completely stuck , can anyone help me please ?

Any tips or sample code i could look at ?

thanks ..

Here is something I did for school a while ago. It can help you get started.

thanks everyone for your help, im slowly getting there.

Your input has been very helpul....

i will post the end result once finished , would like to hear your comments ..

thanks

Here is just the form, should be good enough.