VB文件复制问题,在线等!

我做了一个文件目录和文件列表:Dir1,File1 和一个按钮,现在点击这个按钮可以实现以下功能:
1.打开我的电脑浏览选择文件夹或单个文件,然后确定,提示:你确定选择这个文件吗?"
2.按"是"选项后把文件复制到Dir1或File1目录下,并且提示"复制完成"
按"否"后提示:"你还没有选择文件!"
注意不要用通用对话框,有API的优先考虑,如没有也没办法了,用通用对话框也可以.

用API调用公用对话框的例子，其余部分自己写吧

Private Declare Function GetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long

Private Type OPENFILENAME
lStructSize As Long
hwndOwner As Long
hInstance As Long
lpstrFilter As String
lpstrCustomFilter As String
nMaxCustFilter As Long
nFilterIndex As Long
lpstrFile As String
nMaxFile As Long
lpstrFileTitle As String
nMaxFileTitle As Long
lpstrInitialDir As String
lpstrTitle As String
flags As Long
nFileOffset As Integer
nFileExtension As Integer
lpstrDefExt As String
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type

Private Sub Command1_Click()
Dim ofn As OPENFILENAME
Dim rtn As String
ofn.lStructSize = Len(ofn)