Option Explicit
Private Declare Function ShowWindow Lib "user32.dll" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Const SW_HIDE As Long = 0
Private Const SW_NORMAL As Long = 1
Dim lRet As Long
Private Sub Form_Load()
ShowWindow FindWindow("ImWindowClass", vbNullString), SW_NORMAL
End Sub
Lo acabo de hacer, a mi me funcionó