vb.net - Visual Basic Not all code paths return a value -

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in visual basic 2010, program compiles without problem. however, warning "not code paths return value" on function. since our assignment requirement must submit without error , warning need solve these error.

part of sample code: 

dim integer = 0  dim currentchar string = frmmycompiler.textbox.text(i)  function tonextword()      = + 1      currentchar = frmmycompiler.textbox.text(i) end function

my function did not have data type because no need return anything. can vb use void same c++ ?? know how overcome problem?

use sub tonextword() return void, instead of function. here have documentation.


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