VB基本语句请教

正在学习，看到一下语句，就做了个窗体，一个按钮，下列语句添加到按钮中试运行，
Public Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal Scan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)

Private Sub Command1_Click()
Call keybd_event(91, 0, 0, 0)
Call keybd_event(82, 0, 0, 0)
End Sub

结果显示
编译错误
常数，固定长度字符串，用户定义类型，Declare语句不允许作为对象模块的public成员

这是啥意思啊，该怎么解决调试？

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Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal Scan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)

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private,看看MSDN

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你的代码在窗体中的话，声明中改public 为private

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Public改为Private 就行了,窗体中的API只能声明为Private