Private Declare PtrSafe Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA"
(ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long

Private Declare PtrSafe Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA"
(ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lpFileName As String) As Long

Private Sub Write_Click()
 WritePrivateProfileString "Parameters", "Autolaunch", "1", "D:Test.ini"
End Sub

Private Sub Read_Click()
    Dim buffer As String, IniData As String
     buffer = String(255, Chr(0))
     MsgBox Left(buffer, GetPrivateProfileString("Parameters", "Autolaunch", "1",
 buffer, Len(buffer), "D:Test.ini"))
End Sub