vb.net - Generate code when correct picturebox is clicked -

i making game kids learn different parts of objects part of 9th grade tech class syllabus. there picture of plane , 6 smaller pictures underneath it. 3 of pictures components of plane, others won't.

only when person playing has clicked 3 right components win game.

i can't figure out way code program 3 pictures need clicked before program advances.

take 7 picturebox saying, suppose main picturebox picturebox1 , underneath ones picturebox2, picturebox3, picturebox4, picturebox5, picturebox6, picturebox7.

if correct picturebox 2, 3, 4, then, write following code under click events.

private sub form1_load () handles mybase.load        textbox1.hide        textbox1.text = 0 end sub  private sub picturebox2_click () handles picturebox2.click        textbox1.text = val(textbox1.text) + 1 end sub  private sub picturebox3_click () handles picturebox3.click        textbox1.text = val(textbox1.text) + 1 end sub  private sub picturebox3_click () handles picturebox3.click        textbox1.text = val(textbox1.text) + 1 end sub  private sub textbox1_textchanged () handles textbox1.textchanged        if val(textbox1.text) = 3             'things here want when correct pictures clicked        end if end sub 

i hope understand!