LotusScript for Visual Basic Programmers - IBM Redbooks

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Dim doc As NotesDocument Set uidoc = ws.CurrentDocument Set doc = uidoc.Document Execute doc.txtScript Print "Completed Script" End Sub Other Interesting LotusScript Commands The Width #filenumber, Width statement forces a set ASCII file width, with autowrap to the beginning of the next line when the width has been exceeded. The YIELD statement is equivalent to doEvents in Visual Basic 4. And the Yield statement requires a return value, unlike the doEvents in Visual Basic, but equivalent to Visual Basic’s doEvents function. The TypeName (strFileName$) statement will return the word “STRING”. This allows you to determine the datatype of a variable at run time, which is useful when you have passed variables that may contain any type of data in them. LotusScript “feels” a little more like C++ than like BASIC sometimes. Beyond the standard BASIC keywords, LotusScript provides for additional syntax such as “Declare”ing a forward reference to a function or subroutine. This allows you to code and test the sub or function before it’s actually included in your main app — something that’s particularly useful in team development environments. Developers familiar with Object-Oriented programming will quickly find themselves creating and instantiating objects using new (constructors), delete (destructors), and data-hiding features you would expect to see in C++. On Event Click from call allows you to react to events happening in other Lotus products. For example, this would allow you to create a page-turning presentation to use in a Lotus Notes training application. Evaluate (Macro, object) allows you to easily call another (Lotus only) product macro. This allows you to pass a string of numbers to a spreadsheet to be totaled, etc. The %Include command gives you the ability to include LotusScript variable, constant and API declarations into your code from external ASCII files. This allows you to sort through all of the various files provided by 18 LotusScript for Visual Basic Programmers
Lotus, creating a cut-down version that contains just the statements that you need. You can then add all of this to a new application with one line of code: %Include “MY-DEFS.LSS”. This behaves the same as if you were using files in C or files in C++. The %Include command can only be used in the general declarations sections of an object; not within the event code itself. Uni (strExp) and UChr (longValue) functions work together like Visual Basic’s Asc and Char statements, but for Unicode characters. Uni ( ) returns the Unicode numeric character code for the first character passed as the string parameter. UChr ( ) returns the character represented by the long number passed as an argument. Using the Print stringRef command in LotusScript by itself will place the string in the last message status bar area of Lotus Notes, as is shown in this figure. This makes for a useful display area when debugging your program and is a good place to drop critical run time messages if you are writing code for agents, monitors or other background tasks. Other Interesting Visual Basic Commands Visual Basic supports Named and Optional parameters in its subs, functions and property procedures, allowing you to specify the parameters in any order and to choose which parameters you actually want to call the routine with. Visual Basic allows you to create OLE Servers (EXEs and DLLs in the 32-bit version). Object-Oriented Programming (OOP) Object-oriented (OO) development features include inheritance, polymorphism, data encapsulation and creating classes. Classes A class can be thought of as a template that can be used to create multiple instances of objects at run time. Each object contains its own copy of data, which can be changed via properties provided externally to the user (or Chapter 1: LotusScript and Visual Basic: A Comparison 19
Page 1 and 2: LotusScript for Visual Basic Progra
Page 3 and 4: Abstract This redbook describes how
Page 5 and 6: NotesTimer ................... ....
Page 7 and 8: Preface This redbook describes how
Page 9 and 10: Chapter 12, “Using Notes as an OL
Page 11 and 12: Chapter 1 LotusScript and Visual Ba
Page 13 and 14: Object-Oriented Terminology LotusSc
Page 15 and 16: There are many good examples of how
Page 17 and 18: LotusScript only allows arrays and
Page 19 and 20: File I/O Code such as the following
Page 21 and 22: "frmMain::cmdUpdateDB_Click") then
Page 23 and 24: MessageBox Visual Basic developers
Page 25 and 26: Extending the Code Visual Basic pro
Page 27: Lotus Components You can add Window
Page 31 and 32: Once you have created the object, y
Page 33 and 34: Public Function PostError(ErrNumber
Page 35 and 36: 1. Consts move out of the class int
Page 37 and 38: In Visual Basic sending a message i
Page 39 and 40: Where LotusScript commands and synt
Page 41 and 42: Chapter 2 The Notes Integrated Deve
Page 43 and 44: Action Pane This is the narrow wind
Page 45 and 46: Run Area The three radio buttons sp
Page 47 and 48: 4. Click the Methods twistie, and a
Page 49 and 50: When you enter structured programmi
Page 51 and 52: ut the results are different. Such
Page 53 and 54: Before we let the code run to the b
Page 55 and 56: The following figure shows the hier
Page 57 and 58: NotesACL Every NotesDatabase contai
Page 59 and 60: NotesAgent NotesAgent is contained
Page 61 and 62: Method Description New Creates a ne
Page 63 and 64: Method Description UnprocessedSearc
Page 65 and 66: NotesDateTime NotesDateTime is cont
Page 67 and 68: Property Description Name Read-only
Page 69 and 70: Method Description Save Saves any c
Page 71 and 72: Property Description UniversalID Re
Page 73 and 74: NotesEmbeddedObject The NotesEmbedd
Page 75 and 76: NotesInternational The NotesInterna
Page 77 and 78: NotesLog Property Description IsNam
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NotesName The NotesName class will
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NotesRichTextItem NotesRichTextItem
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Method Description CreateNewsletter
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NotesTimer The NotesTimer class wil
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Method Description GetPrevSibling G
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NotesUIWorkspace NotesUIWorkspace c
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Method Description FindFreeTimeDial
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NotesUIDatabase The NotesUIDatabase
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The following figure shows how it w
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Dim doc As Object We create a refer
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Declaring Notes Classes in Visual B
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In Visual Basic, we can access the
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Dim doc As Object Dim item As Objec
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The following figure shows a Visual
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Chapter 5 Converting HiTest Applica
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We declare an hgstatus variable. Al
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Converting a HiTest Application Usi
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2. Put the following code on the Cr
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Converting a HiTest Application to
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6. Enter the following code on the
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10. From the Notes menu, choose Fil
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Accessing Notes Session Properties
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Example This example sets the value
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HiTest Functions Notes Class method
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Accessing Notes Sessions in LotusSc
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Chapter 7 Accessing Notes Databases
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We set the property of hgdatabase.
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HiTest Name LotusScript Notes Class
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All of the methods mentioned above
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REM view becomes a NotesView object
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We create a new database on a local
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Dim hgviewid As Long Dim hgview As
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Following is an explanation of the
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We declare a session, db and view w
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The HiTest Visual Basic API does no
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Chapter 9 Accessing Notes Documents
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We create and open a new document u
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HiTest Function Name Notes Classes
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Set doc = dc.GetFirstDocument(1247)
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NotesUIDocument = EditDocument([boo
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Set dc = db.AllDocuments Set doc =
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We enter text in the Subject, Categ
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Attachments Internally, Lotus Notes
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hgstatus = HTDocumentClose(hgdest_d
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Windows 3.1. For details on the OLE
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Dim db As NotesDatabase Dim view As
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Perform the following steps to crea
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Tip You can select Display as icon
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Creating a Linked Object 3. Choose
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Creating an Embedded Object Using L
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Messagebox msg$, boxType, "Successf
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Embedding a New Object in a Documen
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Note If you do not want to create t
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answer% = Messagebox ("Object has b
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16. Click Yes to confirm that you w
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7. Select the Show twistie when row
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Editing a Linked Object Note If you
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Editing an Embedded or a Linked Obj
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The object’s application is launc
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Following is a description of the L
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(10) Select Case object.Type Case E
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This statement assigns object as a
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HiTest Class Agent Attachment CDRec
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HiTest Class Datetime Document HiTe
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HiTest Class Item HiTest Functions
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HiTest Class User View Viewcell HiT
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other operating environments may va
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How To Get ITSO Redbooks This secti
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How Customers Can Get ITSO Redbooks
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H handling errors, 95 hierarchical
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