这篇博客介绍了如何在VB中使用系统API调用来实现选择文件夹的功能。通过声明和使用SHBrowseForFolder、SHGetSpecialFolderLocation等函数，可以创建一个浏览对话框，让用户选择文件夹，并获取所选路径。
Option
Explicit
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Private
Declare
Function SHBrowseForFolder()
Function SHBrowseForFolder Lib "shell32.dll" Alias _
"SHBrowseForFolderA" (lpBrowseInfo As BROWSEINFO) As Long
Private Declare Function SHGetSpecialFolderLocation()Function SHGetSpecialFolderLocation Lib _
"shell32.dll" (ByVal hwndOwner As Long, ByVal nFolder _
As Long, pIdl As ITEMIDLIST) As Long
Private Declare Function SHGetFileInfo()Function SHGetFileInfo Lib "Shell32" Alias _
"SHGetFileInfoA" (ByVal pszPath As Any, ByVal _
dwFileAttributes As Long, psfi As SHFILEINFO, ByVal _
cbFileInfo As Long, ByVal UFlags As Long) As Long
Private
Declare
Function SHBrowseForFolder()
Function SHBrowseForFolder Lib "shell32.dll" Alias _ "SHBrowseForFolderA" (lpBrowseInfo As BROWSEINFO) As LongPrivate Declare Function SHGetSpecialFolderLocation()Function SHGetSpecialFolderLocation Lib _ "shell32.dll" (ByVal hwndOwner As Long, ByVal nFolder _ As Long, pIdl As ITEMIDLIST) As LongPrivate Declare Function SHGetFileInfo()Function SHGetFileInfo Lib "Shell32" Alias _ "SHGetFileInfoA" (ByVal pszPath As Any, ByVal _ dwFileAttributes As Long, psfi As SHFILEINFO, ByVal _ cbFileInfo As Long, ByVal UFlags As Long) As Long
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