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 WHILE condition
      statementblock
 WEND
 
 Usage Notes
   ■ If condition is true - that is, if it does not equal zero - then any
     intervening statements are executed until the WEND statement is
     encountered. Visual Basic then returns to the WHILE statement and
     checks the condition. If it is still true, the process is repeated. If
     condition is not true or equals zero, execution resumes with the
     statement following the WEND statement.
 
   ■ WHILE...WEND loops can be nested to any level. Each WEND matches the
     most recent WHILE. When Visual Basic encounters an unmatched WHILE
     statement, it generates the error message, "WHILE without WEND." If
     Visual Basic encounters an unmatched WEND statement, it generates the
     error message, "WEND without WHILE."
 
   ■ Do not branch into the body of a WHILE...WEND loop without executing a
     WHILE statement. Doing so may cause run-time errors or program logic
     errors that are difficult to locate.