vb中 FindWindows 的用法和结构,谁能帮我分析分析!!

findwindows?
应该是API的findwindow函数吧

Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

'lpClassName 类名
'lpWindowName 窗口标题

Dim frmHwnd As Long

Private Sub Form_Load()
'方法一:
frmHwnd = FindWindow("#32770", vbNullString) '找到类名为"#32770"的窗口
'方法二:
frmHwnd = FindWindow(vbNullString, "QQ用户登录") '找到窗口标题为"QQ用户登录"的窗口

If frmHwnd <> 0 Then MsgBox "找到QQ登陆窗口！"
End Sub

是findwindow
一般用来查找窗体的函数，返回句柄