System registry in VB
Ini files are mostly in-inch to put their own interface or initialize information, and the application should use system information or to know some information that has been registered in the system, it is necessary to read the system registry, such as some applications need to use calls. MS Outlook Express needs to read the path from the installroot from HKEY_LOCAL_MACHINE / SOFTWARE / Microsoft / Outlook Express / Microsoft / Outlook Express.
Declinations:
Option expedition
Public const _ = & 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 HKEYEXA "(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 LongDeclare Function RegCloseKey Lib "advapi32.dll "(Byval HKEY As Long) As Long
Function SDageTRegentry (strkey as string, strsubkeys as string, lngtype as ring) AS String
On Error Goto SdageTregentry_ERR
Dim Lngresult As Long, LngKey As Long
Dim LNGHANDLE AS Long, LNGCBDATA AS Long
DIM STRET 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, STRSUBKKEYS, 0 &, Key_Read, LNGHANDLE) THEN EXIXIT 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
It seems that it is very complicated, but it is simple, which has reached a complex purpose. For example: Using 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
