莫名奇妙的SHGetPathFromIDList函数
下面这个代码是excel的VBA代码:Declare Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" (lpBrowseInfo As FolderInfor) As Long
Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" (ByVal pidl As Long, ByVal pszPath As String) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function EnableWindow Lib "user32" (ByVal hWnd As Long, ByVal fEnable As Long) As Long
Public Type FolderInfor
hOwner As Long
pidlRoot As Long
pszDisplayName As String
lpszTitle As String
ulFlags As Long
lpfn As Long
lParam As Long
iImage As Long
End Type
Sub getpath()
Dim iFolder As FolderInfor
Dim pidl As Long, Flag As Long, iPath As String, Pos As Integer, myPath As String
EnableWindow FindWindow("XLMAIN", Application.Caption), False
pidl = SHBrowseForFolder(iFolder)
EnableWindow FindWindow("XLMAIN", Application.Caption), True
iPath = Space$(512)
Flag = SHGetPathFromIDList(ByVal pidl, ByVal iPath)
If Flag Then
Pos = InStr(iPath, Chr$(0))
myPath = Left(iPath, Pos - 1)
End If
MsgBox "你选择了 " & myPath
End Sub
在 Flag = SHGetPathFromIDList(ByVal pidl, ByVal iPath)
后,iPath的值改变了,但根据ByVal,iPath只是形参啊,怎么回事啊?
补充:.NET技术 , VB.NET