Minimizing a Userform

I have code that enables me to add a minimize button to my userforms, but I don't know the code to tell the userforms to minimize. Can anyone help me with this? I would also need to know the code to make the userform reappear. Here is what I have for adding the minimize button:

In the module window:

Private Declare Function FindWindowA Lib "USER32" _
(ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long

Private Declare Function GetWindowLongA Lib "USER32" _
(ByVal hWnd As Long, _
ByVal nIndex As Long) As Long

Private Declare Function SetWindowLongA Lib "USER32" _
(ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long

Sub FormatUserForm(UserFormCaption As String)
 Dim hWnd            As Long
 Dim exLong          As Long

    hWnd = FindWindowA(vbNullString, UserFormCaption)
    exLong = GetWindowLongA(hWnd, -16)
    If (exLong And &H20000) = 0 Then
        SetWindowLongA hWnd, -16, exLong Or &H20000
        Else
    End If
End Sub

In the userform code window:

Private Sub UserForm_Initialize()
    Call FormatUserForm(UserForm1.Caption)
End Sub

Thanks in advance for your help!