代码运行时使用控件值

某些控件属性可在 Visual Basic 代码运行时设置和返回。下例将文本框的 Text 属性设置为“Hello”。

TextBox1.Text = "Hello"

当窗体关闭时，用户在窗体中输入的数据将丢失。如果在窗体卸载后再返回该窗体上的控件值，那么所返回的将是控件的初始值，而不是用户所输入的值。

如果要保存窗体上所输入的数据，可在窗体仍处于运行状态时，将信息保存到模块级的变量中。下例显示窗体，并保存窗体数据。

' Code in module to declare public variables.
Public strRegion As String
Public intSalesPersonID As Integer
Public blnCancelled As Boolean

' Code in form.
Private Sub cmdCancel_Click()
    Module1.blnCancelled = True
    Unload Me
End Sub

Private Sub cmdOK_Click()
    ' Save data.
    intSalesPersonID = txtSalesPersonID.Text
    strRegion = lstRegions.List(lstRegions.ListIndex)
    Module1.blnCancelled = False
    Unload Me
End Sub

Private Sub UserForm_Initialize()
    Module1.blnCancelled = True
End Sub

' Code in module to display form.
Sub LaunchSalesPersonForm()
    frmSalesPeople.Show
    If blnCancelled = True Then
        MsgBox "Operation Cancelled!", vbExclamation
    Else
        MsgBox "The Salesperson's ID is: " &
            intSalesPersonID & _
            "The Region is: " & strRegion
    End If
End Sub