vb.net - Using global variable to show value on progress bar -

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i making game in visual basic 2010 , have completed except 1 problem have encountered in regards using global variables. have set them in module shown below:

module module1 public structure maths     public accuracy integer     public speed integer     public vision integer end structure  public mathsprogress maths end module

what trying these variables use them within 1 form store values can transfer values second form. this, have created nested if statements should set value of variable mathsprogress.accuracy = x depending on value of 'incorrect'.

  '''''''''''continued''''''''''''''''''   else : incorrect = incorrect + 1           if incorrect = 0             mathsprogress.accuracy = 10         elseif incorrect < 2 , incorrect > 0             mathsprogress.accuracy = 9         elseif incorrect = 3             mathsprogress.accuracy = 8         elseif incorrect = 4             mathsprogress.accuracy = 7         elseif incorrect = 5             mathsprogress.accuracy = 6         elseif incorrect = 6             mathsprogress.accuracy = 5         elseif incorrect = 7             mathsprogress.accuracy = 4         elseif incorrect = 8             mathsprogress.accuracy = 3         elseif incorrect = 9             mathsprogress.accuracy = 2         else             mathsprogress.accuracy = 1         end if      end if

but unknown reason, when use variable in second form supposed show value of 'mathsprogress.accuracy' in progressbar, says 'the value of 0 not valid, must between minimum , maximum' makes me think value stored if statement not being transferred third form. code in third form is:

 private sub pbaccuracy_click(byval sender system.object, byval e system.eventargs) handles pbaccuracy.click     pbaccuracy.value = mathsprogress.accuracy end sub

i know variables set correctly because works when set mathsprogress.accuracy = 10 within form load of first form. problem may lie in have placed chunk of if statements, can explain?

thanks


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