Access Forms Help

I need to make a form in access with the usual text controls and 3 buttons : Add Modify and Delete... I have done this kind of stuff in VB but never in VBA...I thought it would be very similar...but when I looked at some sample code that was given to me.. I did not make any sense to me...neither do I have any access to any VBA books....

a) Can anyone point me to a VBA tutorial\code sample for Data Entry Forms in particular...ones with Add Modify Delete Find etc. in them ???

b) I have a code sample right here that is not making any sense to me...makes sense to you ?

VB Code:

Private Sub cmdFind_Click()
On Error GoTo Err_cmdFind_Click
 
    Me!frmEquipSummary.Requery
    DoCmd.RepaintObject
    Me!txtEquipID = [Forms]![frmEquipMain]![frmEquipSummary]![txtEquipID]
 
Err_cmdFind_Click:
    Exit Sub
    
End Sub

a)...how does this syntax work...Me!frmEquipSummary.Requery ?
b) I couldnt find this object DoCmd defined anywhere...is this a part of some standard library thing or what
c) What is the whole deal with these square brackets in the 3rd statement

b)DoCmd should be in the Help file (once you're in the code editor, anyway). Basically it runs various Access commands. Maybe Excel as well, but I don't use that.
c)The square brackets in Access go around keywords used as table or field names, or multiword names (i.e., a table named Some Table). I think Access actually puts them around every table and field name if you use the query designer, but they're not always required if you write your own SQL.