コマンドから表示するフォームをアプリケーションの最上位に設定する方法

Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Integer, ByVal nIndex As Integer, ByVal dwNewLong As Integer) As Integer
Public Declare Function GetParent Lib "user32" (ByVal hWnd As Integer) As Integer
Public Const GWL_HWNDPARENT = -8
 
'ArcMapの最上位にフォームを表示してタスクバー切り替えをArcMapに追従
Sub ShowWindowOnTopOfArcMap()
    Dim pApplication As IApplication
    Set pApplication = m_hook
     
    '特定のウィンドウハンドルの親ウィンドウハンドルを取得（Engineの場合）
    Dim pToolbarControl As IToolbarControl
    Set pToolbarControl = m_hookHelper.hook
     
    Dim intParent As Integer
    intParent = GetParent(pToolbarControl.hWnd)
     
    '親フォームのウィンドウハンドルと関連付け
    Dim intOriginal As Integer
    intOriginal = SetWindowLong(OriginalForm.hWnd, GWL_HWNDPARENT, pApplication.hWnd)
    OriginalForm.Show
     
'    '元のウィンドウハンドルを返す場合
'    SetWindowLong OriginalForm.hWnd, GWL_HWNDPARENT, intOriginal
 
End Sub
 
 
'Dim pGeometricNetwork As IGeometricNetwork
'Set pGeometricNetwork = pNetworkAnalysisExt.CurrentNetwork
 
'Dim pNetwork As INetwork
'Set pNetwork = pGeometricNetwork.Network
'
'Dim pNetElements As INetElements
'Set pNetElements = pNetwork
'
'
'Dim UserClassID As Long
'Dim UserID As Long
'Dim UserSubID As Long
'
'pNetElements.QueryIDs 0, esriETNone, UserClassID, UserID, UserSubID
'
'Debug.Print UserClassID, UserID, UserSubID