[2005] popping up message wen forgotten to insert details

i want, when i forgot to insert the details in one of the fields, there will be a pop up error but the thing is, i did not know how to do the codes. can someone give me the codes??? plzzz

What field? When do you want this message to appear?

a form that contains 2 textboxes and 1 button that say Add button. when the user did not attempt to two textboxes and just click on the Add button, there will be an error saying that ("You have to attempt all the textboxes"). what codes shud i do? can pass me the codes??

You want to do something when the user clicks a button then handle its Click event. In the event handler test the Text property of each TextBox to make sure its a valid value. I usually test for at least one non-whitespace character:

VB Code:

If Me.TextBox1.Text.Trim() = String.Empty Then
    'The field is empty so display an error message.

where shud i put that code into my code since my code looks like this :

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cmd As New OleDb.OleDbCommand

Dim strsql As String
con = New OleDb.OleDbConnection(strcon)
con.Open()

strsql = "Insert into item(ItemId,ItemTitle,ItemCategory,ItemClassification,Status,AuthorName,DateOfPublished,DateCreated, CostPriceOfItem,PublisherName,ReferenceNo,Edition,DateUpdated) values('" & TextBox1.Text & "',' " & TextBox3.Text & "',' " & ComboBox2.Text & "','" & ComboBox3.Text & "',' " & ComboBox1.Text & "','" & TextBox4.Text & "',' " & TextBox5.Text & "','" & TextBox8.Text & "','" & TextBox9.Text & "','" & TextBox6.Text & "','" & TextBox2.Text & "','" & TextBox10.Text & "','" & Format(DateTimePicker1.Value) & "')"
cmd.Connection = con
cmd.CommandText = strsql
cmd.ExecuteNonQuery()

con.Close()

MsgBox("Successfully Adding Record!")
Me.Close()

End Sub

do help me will you?? please

Think about when you want it to happen. You need it to happen when the user clicks the button, so obviously it has to go in the button's Click event handler, which I already stated in my previous post. Now, do you think you should test the fields before or after saving the record to the database? Not much point doing it after is there? You check the fields and if one is empty then you display the error message, otherwise you save the record.