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dbScrBlank()
Delete a SAVESCREEN in the internal stack
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Syntax:

     dbScrBlank( <cLab> ) --> NIL

Parameters:

     <cLab>     Delete the value of a SAVESCREEN from the
     SCREENSTACK without delete if from the stack

Returns:

     NIL

Description:

     Delete a SAVESCREEN in the internal stack

Example:

     LOCAL cScreen := dbScrLab()
     dbScrSav( cScreen ) // Save the screen
     // Working
     dbScrRes( cScreen ) // Restore
     dbScrBlank( cScreen ) // Clear the screen

See also:

     dbScrDel(), dbScrRes(), dbScrSav(), dbSrcSav()