Need help loading forms on Visual basic 6.0?

On form1 of the program there are 3 command ons namely cmdClose, cmdClear, and cmdCompute, 4 label boxes to name the 4 textboxes namely txtPre_Read, txtCur_Read, txtPPA_Val and txtCur_adj. Upon running the program, I could be able to input the values for the 4 given textboxes and by clicking cmdCompute form2 will launch showing a form that contains the output values. My problem is, should I declare the variables that are to be shown on form2 on form1 or should I declare them on form2 itself?