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 Browse a DBF with for and while clauses.
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 Syntax

        GT_Browse(<aFields>,<aTitles>,[<cHead>],[<nTop>], ;
            [<nLeft>],[<nBottom>],[<nRight>],[<bFind>], ;
            [<bFor>],[<nFreeze>],[<bKeyEx>],[<bWaitFunc>], ;
            [<cBox>],[<lScreen>]) -> lSelected

 Arguments:

      <aFields> is an array of code blocks defining the
      information to be displayed.

      <aTitles> is an array of strings to display as
      column titles.

      <cHead> is a title for the Browse.

      <nTop>,<nLeft>,<nBottom>,<nRight> are the table
      corners.

      <bFind> is the while clause code block to compare
      against the index key.

      <bFor> is the for condition code block.

      <nFreeze> is the number of columns to freeze from
      the left.

      <bKeyEx> is a code block containing the code for
      handling key exceptions. Should return .T. if an
      item has been selected, otherwise .F..

      <bWaitFunc> is the code block defining the 'Waiting
      For a Key Press' function.

      <cBox> box lines definition.

      <lScreen> Should the screen be saved and restored ?

 Returns:

      lSelected

 Description:

      Browse a DBF with for and while clauses.

 Examples:

 Source: GT_BROWS.PRG

 Author:  Martin Bryant