LotusScript for Visual Basic Programmers - IBM Redbooks

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Notes differs significantly from Visual Basic. It is easier to change the properties of controls in Visual Basic when compared to LotusScript. Different Windows events are provided for the same controls and the names of these events are also sometimes different. For example, a button in Visual Basic has the following events: Click DragDrop DragOver GotFocus KeyPress KeyDown KeyUp LostFocus MouseDown MouseMove MouseUp In addition, you can cause the Visual Basic Button_Click event to execute by setting the implied .Value property of the button to true, as in cmdCancel = True. In LotusScript, the events provided for a button are: Click Terminate Initialize ObjectExecute Options Declarations Notice the ability to include declarations directly within an object, such as a button. 28 LotusScript for Visual Basic Programmers
Where LotusScript commands and syntax are like Visual Basic’s (for example, the %If ... %Endif as compared to the #If ... #End If conditional compilation commands), they will need to be converted, redone or not used in order to create code that is truly portable between Visual Basic and LotusScript. Unlike Visual Basic, LotusScript is not centered around the Properties, Methods, and Events metaphor. LotusScript is built around interacting with the objects provided within the respective host application and development tools provided by Lotus. For example, objects don’t have Tags or Captions. A static text object uses a text property rather than a caption property to read and change its value. So any Visual Basic code that refers to captions for labels needs to be changed. Similarly, LotusScript doesn’t support the tag property. But LotusScript does have a Name(variable) function that returns an item’s name, which can then be used to operate on objects dynamically at runtime. Control Arrays LotusScript does not support control arrays or indexes on individual objects in the same way as Visual Basic. So your Visual Basic code that sets up an array of text objects with a common code routine — as with Sub txtAmtField_Click (amtIdx as index) — will need to be rewritten. Buttons under LotusScript are set up as individual buttons or to act as group or checkbox buttons when they are placed onto the screen. Visual Basic Environment Constants If you are using any of the new Visual Basic embedded constants, you will need to provide a translation file of codes for anything that you want to move to LotusScript. Or you can simply choose not to use the Visual Basic constants in the first place. For example, you might be using things like this in Visual Basic 4 applications now: If rc = vbYes or rc = vbAbort Then ' add processing here. EndIf You will need to add constant declarations for vbYes and vbAbort in code ported to LotusScript; otherwise the references to vbYes and vbAbort would prove invalid. Caution If you are not using Option Declare in your LotusScript or Option Explicit in your Visual Basic modules and move the code shown above, it may compile and give you erroneous results. Both vbYEs and vbAbort would be treated as uninitialized variables and both contain a 0. The code Chapter 1: LotusScript and Visual Basic: A Comparison 29
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 and 28: Lotus Components You can add Window
Page 29 and 30: Lotus, creating a cut-down version
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: In Visual Basic sending a message i
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
Page 79 and 80: NotesName The NotesName class will
Page 81 and 82: NotesRichTextItem NotesRichTextItem
Page 83 and 84: Method Description CreateNewsletter
Page 85 and 86: NotesTimer The NotesTimer class wil
Page 87 and 88: 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
Page 221 and 222:
H handling errors, 95 hierarchical
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