实例代码：

‘声明FindWindow方法，调用user32.dll中的FindWindowA函数
Extern.Declare.micHwnd,"FindWindow","user32.dll","FindWindowA",micString,micString

‘声明SetWindowText方法
Extern.Declare miclog,"SetWindowText","user32.dll","SetWindowTextA",micHwnd,micString

‘获取记事本的窗口的句柄
hwnd = Extern.FindWindow("Notepad",vbNullString)

If hwnd = 0 Then
  MsgBox"未能找到记事本窗口"
End If
‘改变记事本窗口的标题
res = Extern.SetWindowText(hwnd,"Hello world")

问题：