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Microsoft Excel - Macros
Microsoft Excel - Macros
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Learn Excel Macro

  1. 1. Presented By: Abhishek Rajoria
  2. 2. • Excel is object based model… • Objects include things such as application, workbook, worksheet, cells • Each object has properties • Color, border, value, name Macros execute tasks according to instructions. Macros do not think… • Everything you do can be expressed in code (instructions); it is stored the same way. • Each time you do anything in Excel the same action can be expressed in code. • You interact with excel through an interface that makes the code easier to understand/intuit. • Choosing the “sheet1” sheet is expressed as; Sheets(“sheet1”).Select
  3. 3. • It saves time giving you more time to work on higher level tasks • VBA can do things more quickly than you can. • It standardizes processes, eliminates error due to deviation from instructions • It will do the exact same thing each time it runs
  4. 4. • When you are doing a routine task that you can write VERY good instructions for doing, you can likely automate that task by using VBA. • We won‟t use it when abstract thinking or problem solving is a necessary component of the task or when there are any new variables present in our current task.
  5. 5. • Developer tab – first you show get access • Record a macro button – in Developer tab • Alt + F11 show the VBE; Visual Basic Editor • Tour of VBA code area • Project tree, object properties, space for code
  6. 6. • Recording • Button • Naming – no spaces; use underscores or caps • Save in a Workbook • Save in Personal workbook • What is personal workbook • How to open it for the first time • Once you save a macro it opens each time you open Excel • Always hidden. • If you unhide PW and close excel, PW will close! • To re-open; C:Documents and SettingsusernameApplication DataMicrosoftExcelXLSTART – Application Data file is hidden! • How to call the macro – from Developer tab • Save workbook as .xlsm or you will lose your work!
  7. 7. Standard R1C1 =A1+1 =RC[-1]+1 =$A$1+1 =R1C1+1 =$A1+1 =RC1+1 =A$1+1 =R1C[-1]+1 =Sum(A1:A10) =Sum(RC[-1]:R[9]C[-1]) =Sum($A$1:$A$10) =Sum(R1C1:R10C1) • Module subroutines • Show what recording does • Walk through example • Show excess that gets recorded and then how to spot and clean • R1C1 syntax vs. Regular • What is R1C1? • What does R1C1 syntax look like and how to convert? (formula in B1)
  8. 8. • Break mode • When running code produces error you get break mode to fix error and prevent code from continuing or application running. • Sometimes nothing works! Maybe you‟re in break mode? • How to tell and how to tell (in title and yellow highlighting) • How to get out of break mode. • Notes in VBA code • How to write notes “ „ “ • Why to write them • Break code into chunks by function • Record sections of code if you don‟t know syntax
  9. 9. • How to run code from VBE • Call Macro from Excel, F5 in VBA, or “run” from drop-down • How to break code if it keeps going • Show from example • How to create dynamic row length (create example where we see the problem to illustrate problem solving tactic) • Declaring variables using Dim xxx as xxx • Substitute variable for specific reference in code • Code upon a user action In VBA Editor select workbook object • Change left drop-down box to “workbook” • Change right drop-down box to desired action • Place code within the newly create subroutine boundaries
  10. 10. • Loops • For Syntax and example • If Syntax and example • Do While Syntax and example • Example of code/program • Buttons and things • Where to insert buttons • How to assign code to buttons • Userforms • Awesome but code gets more complex • Don‟t forget objects have values – radio button.value can be true or false
  11. 11. • Macros run from wherever you call them if you call them on the wrong sheet the result can be really bad • Use Sheets(“sheetname”).Select to make sure it always goes to the right sheet before you call it • Usage of message boxes to check code – msgbox “stop” • Problem: with filters being off and on and errors – they need to be correct or you‟ll get errors • Problem: with sheets being hidden and referencing them for actions • Error handling • If it is possible that your code will generate an error you don‟t want your code to stop running. Need to tell it to do so b/c by default it stops. 2 methods: • On Error Goto Next • On Error Goto 0
  12. 12. • Syntax in VBA and Excel is not the same…. Of course • Use msgboxes to help see if your code is right • More quotes are needed. • Create a UI with hiding sheets • Create codes that show and hide sheets so that when an action is taken you go to a different part of a workbook. This turns a workbook into an application. • Save before you run, extremely hard to undo macros • The best code never uses the “select” code! Each time this happens it slows down the code. See if you can find ways to only use VBA. • Example: Paste special values formula can be written as „Range(“A3”).Value = Range(“A3”).Value‟

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