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Visual Basic for Applications (VBA)

Visual Basic for Applications (VBA). An object-oriented programming language Instructions for the manipulation of objects A structured way to provide instructions to Excel Excel has an Object Library that defines its set of objects (e.g. workbooks, charts, ranges of cells). Logic of Language.

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Visual Basic for Applications (VBA)

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  1. Visual Basic for Applications (VBA) • An object-oriented programming language • Instructions for the manipulation of objects • A structured way to provide instructions to Excel • Excel has an Object Library that defines its set of objects (e.g. workbooks, charts, ranges of cells)

  2. Logic of Language • First part of a command identifies the object • Second part of command: • Sets a property of the object (e.g. color or font) • Takes an action on the object (e.g.copy or move) • Sets an attribute to the object (e.g. assigns a value to it using := )

  3. Example of an Instruction • Application.Workbooks(“Book1.xls”).Worksheets(“Sheet1”).Range(“A1”).Font.Name=“Arial” • Application.Workbooks(“Book1.xls”).Worksheets(“Sheet1”).Range(“A1”) is the object • Font.Name=“Arial” is the property being set

  4. Control of VBA • A Procedure is a set of instructions that operate on a set of objects • A Function is a procedure that returns a value as a result • A Subroutine is a procedure that can be run or used by another macro

  5. VBA Toolbar (Excel 2003)

  6. Developer Tab (Excel 2007)

  7. BlueCell Macro • Sub bluecell() • ' • ' bluecell Macro • ' Macro recorded 10/12/2002 by LMU LMU • ' • ' • With Selection.Interior • .ColorIndex = 8 • .Pattern = xlSolid • .PatternColorIndex = xlAutomatic • End With • End Sub

  8. Running Macros • Run Macro option • Shortcut Keys: [Ctrl][Shift] letter • Command Buttons • Custom Toolbar

  9. Running Solver through a Macro • Solver dialog box must have been opened at least once in current Excel session (i.e. Solver must be currently activated in Excel) • SolverSolve UserFinish:=True • Tools Reference option in VBA must have Solver selected

  10. Debugging VBA Code • When VBA encounters a problem, it will highlight line in yellow. • Use [f8] key to step through code • Use the Reset icon button (square) at top of VBA to exit step-through mode and trouble- shoot code or Excel/VBA settings. Cannot retry macro until yellow highlight is gone.

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