about color dialog in property

[joaquim]

i'm build a property:

Public Property Get TransparentColor() As Long
    If blnDestroyed = True Then Col.Activate = False
    TransparentColor = lngTransparentColor
End Property

Public Property Let TransparentColor(ByVal vNewValue As Long)
    If blnDestroyed = True Then Exit Property
    lngTransparentColor = vNewValue
    PropertyChanged "TransparentColor"
End Property

my question is: can change "as long" to "commondialog.dialogcolor" or something like that?
my objective is for apper a color dialog.
thanks