ini文件大多用來寸放自己界面或者初始化信息，而應用程序要使用系統信息或者說要得知已在系統注冊過的其他程序的一些信息就要讀去系統注冊表了，比如有些應用需要使用調用MS OutLook Express就需要從HKEY_LOCAL_MACHINE\Software\Microsoft\Outlook Express\中的InstallRoot中讀取路徑�！　∩昝鞑糠郑骸　�Option Explicit　　Public Const READ_CONTROL = &H20000　　Public Const STANDARD_RIGHTS_READ = (READ_CONTROL)　　Public Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)　　Public Const KEY_QUERY_VALUE = &H1　　Public Const KEY_SET_VALUE = &H2　　Public Const KEY_CREATE_SUB_KEY = &H4　　Public Const KEY_ENUMERATE_SUB_KEYS = &H8　　Public Const KEY_NOTIFY = &H10　　Public Const KEY_CREATE_LINK = &H20　　Public Const SYNCHRONIZE = &H100000　　Public Const STANDARD_RIGHTS_ALL = &H1F0000　　Public Const KEY_READ = ((STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) And (Not SYNCHRONIZE))　　Public Const KEY_WRITE = ((STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY) And (Not SYNCHRONIZE))　　Public Const KEY_ALL_ACCESS = ((STANDARD_RIGHTS_ALL Or KEY_QUERY_VALUE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY Or KEY_CREATE_LINK) And (Not SYNCHRONIZE))　　Public Const KEY_EXECUTE = ((KEY_READ) And (Not SYNCHRONIZE))　　Public Const ERROR_SUCCESS = 0&　　Declare Function RegOpenKeyEx Lib "advapi32.dll" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, phkResult As Long) As Long　　Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long　　Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long　　Function sdaGetRegEntry(strKey As String, strSubKeys As String, strValName As String, lngType As Long) As String　　On Error GoTo sdaGetRegEntry_Err　　Dim lngResult As Long, lngKey As Long　　Dim lngHandle As Long, lngcbData As Long　　Dim strRet As String　　Select Case strKey　　Case "HKEY_CLASSES_ROOT": lngKey = &H80000000　　Case "HKEY_CURRENT_CONFIG": lngKey = &H80000005　　Case "HKEY_CURRENT_USER": lngKey = &H80000001　　Case "HKEY_DYN_DATA": lngKey = &H80000006　　Case "HKEY_LOCAL_MACHINE": lngKey = &H80000002　　Case "HKEY_PERFORMANCE_DATA": lngKey = &H80000004　　Case "HKEY_USERS": lngKey = &H80000003　　Case Else: Exit Function　　End Select　　If Not ERROR_SUCCESS = RegOpenKeyEx(lngKey, strSubKeys, 0&, KEY_READ, lngHandle) Then Exit Function　　lngResult = RegQueryValueEx(lngHandle, strValName, 0&, lngType, ByVal strRet, lngcbData)　　strRet = Space(lngcbData)　　lngResult = RegQueryValueEx(lngHandle, strValName, 0&, lngType, ByVal strRet, lngcbData)　　If Not ERROR_SUCCESS = RegCloseKey(lngHandle) Then lngType = -1&　　sdaGetRegEntry = strRet　　sdaGetRegEntry_Exit:　　On Error GoTo 0　　Exit Function　　sdaGetRegEntry_Err:　　lngType = -1&　　MsgBox Err & "> " & Error$, 16, "GenUtils/sdaGetRegEntry"　　Resume sdaGetRegEntry_Exit　　End Function　　看起來很復雜，用起來卻簡單的緊，這就達到了復雜的目的了�！　±�如：使用OutLook Express　　Dim outLook_Path As String　　Dim shstring As String　　outLook_Path = sdaGetRegEntry("HKEY_LOCAL_MACHINE", "Software\MicroSoft\Outlook Express\", "InstallRoot", 2)　　shstring = Mid(Trim(outLook_Path), 1, Len(outLook_Path) - 1) & "\msimn.exe"　　Shell shstring