MessageBox

VB.Net

---

Module MessageBox

    Declare Function MessageBox Lib "user32" Alias "MessageBoxA" (ByVal hwnd As _
    Integer, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As _
    Integer) As Integer

    Public Sub MessageBox_Main()
        MessageBox(Form1.Handle, "Hello World!", "MessageBox", vbOKOnly + vbExclamation)
    End Sub
End Module