Well,

Try to use Kernel32, WinAPI Library.

At your coding,
First, try to declare WinAPI Kernel32

And then at your code :

Private Sub Form_Load()
Message = "Bla bla bla... Before Click Command Button"
End Sub

Private Sub Command1_Click()
Sleep(5000)
Message = ""
Sleep(3000)
Message = "Bla bla bla... After Click Command Button"
End Sub

Cheers,
Wen Lie