When the textboxes are 49 below or 100 above the message should be "Invalid Grade Input".
When the textboxes are blank the message should be " No Grade Input".
When the textboxes are 49 below or 100 above and there are some textboxes that are blank it should be " Invalid Grade Input ".
When the textboxes are 50-100 and some are blanks it should be " No Grade Input "
pls help :'(
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
If TextBox1.Text = "" Or TextBox2.Text = "" Or TextBox3.Text = "" Or TextBox4.Text = "" Then
MessageBox.Show("No Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Else
If TextBox1.Text = "" Or TextBox2.Text = "" Or TextBox3.Text = "" Or Val(TextBox4.Text) < 50 Or Val(TextBox4.Text) > 100 Then
MessageBox.Show("Invalid Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
ElseIf TextBox1.Text = "" Or TextBox2.Text = "" Or TextBox4.Text = "" Or Val(TextBox3.Text) < 50 Or Val(TextBox3.Text) > 100 Then
MessageBox.Show("Invalid Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
ElseIf TextBox1.Text = "" Or TextBox4.Text = "" Or TextBox3.Text = "" Or Val(TextBox2.Text) < 50 Or Val(TextBox2.Text) > 100 Then
MessageBox.Show("Invalid Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
ElseIf TextBox4.Text = "" Or TextBox2.Text = "" Or TextBox3.Text = "" Or Val(TextBox1.Text) < 50 Or Val(TextBox1.Text) > 100 Then
MessageBox.Show("Invalid Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
ElseIf Val(TextBox1.Text) < 50 Or Val(TextBox1.Text) > 100 Or Val(TextBox2.Text) < 50 Or Val(TextBox2.Text) > 100 Or Val(TextBox4.Text) < 50 Or Val(TextBox4.Text) > 100 And Val(TextBox3.Text) < 50 Or Val(TextBox3.Text) > 100 Then
MessageBox.Show("Invalid Grade Input!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Else
Label6.Text = (((Val(TextBox1.Text) + Val(TextBox2.Text)) / 2) * 0.4) + (Val(TextBox3.Text) * 0.1) + (Val(TextBox4.Text) * 0.5)
End If
End If
End Sub