subclass.cls

Visual basic 数据库编程技术与实例源码 源码

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "GSubclass"
Attribute VB_GlobalNameSpace = True
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit

Sub AttachMessage(iwp As ISubclass, ByVal hwnd As Long, _
                  ByVal iMsg As Long)
Attribute AttachMessage.VB_Description = "Start subclassing for a particular message."
    MSubclass.AttachMessage iwp, hwnd, iMsg
End Sub

Sub DetachMessage(iwp As ISubclass, ByVal hwnd As Long, _
                  ByVal iMsg As Long)
Attribute DetachMessage.VB_Description = "Stop subclassing for a particular message."
    MSubclass.DetachMessage iwp, hwnd, iMsg
End Sub

Public Property Get CurrentMessage() As Long
Attribute CurrentMessage.VB_Description = "Returns the message currently being worked on.  Only valid in the MsgResponse and WindowProc items of your implemented interface."
   CurrentMessage = MSubclass.CurrentMessage
End Property
Public Function CallOldWindowProc( _
      ByVal hwnd As Long, _
      ByVal iMsg As Long, _
      ByVal wParam As Long, _
      ByVal lParam As Long _
   ) As Long
Attribute CallOldWindowProc.VB_Description = "Calls the window procedure for this handle which was installed before you added the subclass."
   CallOldWindowProc = MSubclass.CallOldWindowProc(hwnd, iMsg, wParam, lParam)
End Function