ms access - VBA global variable value disappear in other sub -

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i have global variable called flag set up. can access flag every module in code, when assign value 1 in sub command97_click(), reason flag not keep value sub form_beforeupdate(cancel integer). when print flag in sub form_beforeupdate not equal 1 anymore. know silly, new vba...

bear in mind code more this, keeping basic question.

thanks in advance!

public flag integer  private sub command97_click()     flag = 1 end sub  private sub form_beforeupdate(cancel integer)     if flag = 1          docmd.runcommand accmdundo          msgbox "flag = " & flag, vbinformation          exit sub     end if end sub

i suspect have variable scope issue. depends on flag variable defined, , there others same name elsewhere.
if public flag integer @ top of form module, it's not global.

take here explanation of scopes.


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