Forms and Objects

1
Forms and Objects

• Advanced GISWeek 2
• 2006 Fall

2
Difference between Msgbox and forms

• MsgBox and Inputbox can only have limited
  functions. Asking users to type in values, names,
  strings, and received by an variable.
• Form contain many buttons (called controls),
  such as
• Labels
• Textbox
• Combo Box
• List Box
• Buttons
• Option button
• Image box

3
Control Naming convention

• The following table shows common prefixes and
  name examples for some common controls.
• Object  Prefix  Example
• Form frm frmSelect
• Label lbl lblSearchString
• Combo boxcbo cboEditFeature
• Command button cmd cmdCancel
• Directory listbox dir dirPath
• Drive listbox drv drvDrive
• Image img imgBitmap
• Listbox lst lstSelectedFile
• Menu mnu mnuFileSaveAs
• Option button opt optTopology
• Timer tmr tmrAlarm
• Common dialog dlg dlgSaveAs

4
Form name and controls

• Change name from UserForm1 to frmStudent
  (convention for form is frm)
• Change caption to Student Data
• Add the following controls to the frmStudent
• txtName, lblName
• txtCity, lblCity
• cboState, lblState
• cmdClear, cmdQuit, cmdShowData

5
Create a button to show form

• Create a new toolbar and name it as Week 2
  saved in untitled if your project is not saved
  yet.
• Create a new UIButtonControl and name it as
  Project.ShowForm
• Drag it to the Week 2
• Code this button to show frmStudent
• Private Sub ShowForm_Click()
• frmStudent.Show
• End Sub

6
Write code to controls

• Write code to addItem to cboState while in
  frmStudent.initialize
• Tennessee,Kentucky,Georgia, North
  Carolina, India, Other
• In cmdClear_click make sure the frmStudent is
  dismissed (txtName.Text )
• In cmdShowData_Click make sure you show users
  typed data using a new lblShowData (type in the
  following codes
• lblShowData.Caption txtName.Text is from
  

7
Code

• Then clear the input data from each box.
• In cmdQuit_Click make sure you quit the form
  (frmStudent.Hide)
• Use two optionbuttons to show favorite sports
• Use Image control to add image from
  g\5850\castle.jpg
• Add necessary labels to show the functions of
  controls