eventos y botones

[palmerasistemas]

Te paso este codigo que hice para responder tu duda, y mostrarte lo que creo que te refieres.

Espero te sirva de ayuda, Saludos Histoclin.


Public Class Form2

Private Sub Form2_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing

If Not Validacion() Then
e.Cancel = True
Else
Me.Dispose()
End If

End Sub

Private Function Validacion() As Boolean

If Me.ComboBox1.Text = "" Then
MsgBox("El combo debe tener texto")
Return False
End If

If Me.TextBox1.Text = "" Then
MsgBox("El textbox debe tener texto")
Return False
End If

Return True

End Function


Private Sub Form2_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

Me.ComboBox1.Items.Add("Histolcin")
Me.ComboBox1.Items.Add("Histolcin")

End Sub

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

Me.Close()

End Sub


End Class