在VBA中设置全局变量

Question

我目前在PowerPoint中制作"操作系统",我需要知道如何为设置设置全局变量.

我创建了一个名为"Settings"的模块,其中包含:

Public Sub Settings()

Option Explicit
Public UserName, UserIcon, Background, BrowserHomePage As String
Public SetupComplete As Boolean

SetupComplete = False
UserName = "Administrator"
UserIcon = Nothing
Background = Nothing
BrowserHomePage = Nothing

'Set the variables
UserName.Text = UserName

End Sub

现在在"登录"屏幕上,我有一个名为"UserName"的文本框.然后我做了一个按钮来测试变量.按钮执行此操作:

Private Sub CommandButton1_Click()
UserName.Value = UserName
End Sub

单击按钮时,文本框没有任何值.我是VBA的新手,想知道如何做到这一点.此外,如果有人知道如何在启动PowerPoint时自动执行代码,那将是非常棒的.

编辑:我正在尝试制作一个只包含设置的模块.有人可以指出如何更改幻灯片中的值吗？就像我单击幻灯片1中的按钮一样,我希望它将模块"设置"中的"UserName"值更改为我想要的任何值.

解决方案:好的,我找到了一个解决方案.我必须将设置写入文本文件并检索它以供阅读.

我的设置模块:

Public UserName As String, Password As String, UserIcon As String, DesktopBackground As String, LogInBackground As String, BrowserHomePage As String
Public InitialSetupCompleted As Boolean

Public Sub ReadSettings()

'Delcaring variables
TempDir = Environ("Temp")
SettingsFileName = "\OpenOSSettings.txt"
SettingsFile = TempDir & SettingsFileName
ReadFile = FreeFile()

'Read all settings from file
Open SettingsFile For Input As #ReadFile
Do While Not EOF(ReadFile)
    Line Input #ReadFile, Read
        If Read Like "UserName = *" Then
        UserName = Replace(Read, "UserName = ", "")
        End If
        If Read Like "Password = *" Then
        Password = Replace(Read, "Password = ", "")
        End If
        If Read Like "UserIcon = *" Then
        UserIcon = Replace(Read, "UserIcon = ", "")
        End If
        If Read Like "DesktopBackground = *" Then
        DesktopBackground = Replace(Read, "DesktopBackground = ", "")
        End If
        If Read Like "LogInBackground = *" Then
        LogInBackground = Replace(Read, "LogInBackground = ", "")
        End If
        If Read Like "BrowserHomePage = *" Then
        BrowserHomePage = Replace(Read, "BrowserHomePage = ", "")
        End If
        If Read Like "InitialSetupCompleted = *" Then
        InitialSetupCompleted = Replace(Read, "InitialSetupCompleted = ", "")
        End If
Loop
Close #ReadFile

'Applying settings to all elements
Slide5.UserName.Caption = UserName

End Sub


Public Sub SaveSettings()

'Declaring variables
TempDir = Environ("Temp")
SettingsFileName = "\OpenOSSettings.txt"
SettingsFile = TempDir & SettingsFileName
WriteFile = FreeFile()

'Write all settings to file
Open SettingsFile For Output As #WriteFile
Print #WriteFile, "UserName = " & UserName
Print #WriteFile, "Password = " & Password
Print #WriteFile, "UserIcon = " & UserIcon
Print #WriteFile, "DesktopBackground = " & DesktopBackground
Print #WriteFile, "LogInBackground = " & LogInBackground
Print #WriteFile, "BrowserHomePage = " & BrowserHomePage
Print #WriteFile, "InitialSetupCompleted = " & InitialSetupCompleted
Close #WriteFile

End Sub

现在要保存设置,我只使用文本框和按钮.将TextBox1的值保存到文件中的UserName:

Private Sub CommandButton1_Click()
UserName = TextBox1.Value
Settings.SaveSettings
End Sub

读取UserName的值并将其放入TextBox1:

Private Sub CommandButton2_Click()
Settings.ReadSettings
TextBox2.Value = UserName
End Sub

代码很长,但效果很好.感谢大家!

Answer 1

不要将您的设置值放入模块中。模块用于代码，尝试在其中存储数据时您会做比您想要的更多的工作。将设置存储在注册表或文本文件中。如果您希望设置位于文件内部，您可以使用 CustomDocumentProperties 或隐藏幻灯片 - 我对 PPT 的了解不够，无法给您提供好的建议。

制定一个从存储设置的位置读取设置的过程。然后制定一个程序将它们写回到存储中。当用户单击幻灯片上的某个按钮时，您可以更改 Username 变量，然后执行将其写入存储的过程。

在同一行声明变量时，必须包含每个变量的类型。

Public UserName, UserIcon, Background, BrowserHomePage As String

dims BrowserHomePage 为 String，但其他三个变量为 Variants。用这个代替

Public UserName As String, UserIcon As String, Background As String, BrowserHomePage As String

或者更好，但他们都各行其是。