MDI and Color Active Child Border

VB Code:

Public Sub ChildColorBorder(frmChild As Form, lngColor As Long)
'Change the Active Child Border Color
 
   #If kDEBUGON Then
       Debug.Print "Begin ColorBorder"
   #End If
 
    Dim hWindowDC As Long
    Dim hOldPen As Long
    Dim nLeft As Long
    Dim nRight As Long
    Dim nTop As Long
    Dim nBottom As Long
    Dim Ret As Long
    Dim hMyPen As Long
    Dim WidthX As Long
    
    'Pen Styles
    Const PS_SOLID = 0
    
    '------------
    WidthX = 8
 
    'hWindowDC = frmChild.hDC                'this draws inside the form (client)
    hWindowDC = GetWindowDC(frmChild.hwnd)   'this draws outside the form (non-client)
    
    hMyPen = CreatePen(PS_SOLID, WidthX, lngColor)
    
    'Initialize misc variables
    nLeft = 0
    nTop = 0
    nRight = frmChild.Width / Screen.TwipsPerPixelX
    nBottom = frmChild.Height / Screen.TwipsPerPixelY
    
    hOldPen = SelectObject(hWindowDC, hMyPen)
    
    Ret = LineTo(hWindowDC, nLeft, nBottom)
    Ret = LineTo(hWindowDC, nRight, nBottom)
    Ret = LineTo(hWindowDC, nRight, nTop)
    Ret = LineTo(hWindowDC, nLeft, nTop)
 
    Ret = SelectObject(hWindowDC, hOldPen)
    Ret = DeleteObject(hMyPen)
    Ret = ReleaseDC(frmChild.hwnd, hWindowDC)
    
    #If kDEBUGON Then
        Debug.Print "End ColorBorder"    '; hWindowDC
    #End If
 
End Sub