Form1
!DataTable Example Program - DEMO1
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Form1
Customer
	DATATABLE
C:\CUSTOMER
Label1
Name:
CustomerName
Label2
Address:
Address
Label3
City:
Label4
State:
State
Label5
Label6
Phone:
Phone
	TopButton
NextButton
InsertButton
Insert
DeleteButton
Delete
QuitButton
BottomButton
Bottom
PreviousButton
Previous
UpdateButton
Update
ClearButton
Clear
QuitButton_Click
Form_Click
	Form_Load>
Customer
	OpenTableg
Action
CloseTable%
FillForm
	GetRecord
	FieldName
GetField
CustomerName:
Text$
FieldValue
Address
StateW
Phone}
	InsertRecW
PutField
InsertRecord
InsertButton_Click
ClearButton_Click
TopButton_Click
FirstRecord
BottomButton_Click
LastRecord
NextButton_Click
NextRecord
PreviousButton_ClickJ
PreviousRecord
DeleteButton_Click
DeleteRecord
	UpdateRec
UpdateRecord
UpdateButton_Click
Reaction
DisplayError
TheError
Form_Unload
Cancel
Form_Load
This code opens the database table (C:\CUSTOMER) and fills in the Visual Basic
Form with the information present in the first record in the database.
Open up the database table (Customer.TableName)e
Fill the form 
QuitButton_Click
This code closes our database table and terminates the Demo programm
Close the database table
Terminate this demoe
FillForm
We need to get the current record in the database:
Ok, now lets get the values in the database fields for the
record we just read in::
We need to make a one-to-one relationship between the fields in the database table
and the fields on our Visual Basic Form. We will read in the field values from the
database record and place those values into the .TEXT property of our TEXT controlss
on our Visual Basic form. For each field of interest this is a three-step process:
1. Specify the name of the database field of interest ---> DataTable.FieldName = "
2. Get the field value ---> DataTable.Action = GetFieldd
3. Place the field value in the TEXT control ---> Text1.TEXT = DataTable.FieldValuee
Thats all there is to it!!
You should make a FillForm like subroutine position independent. Notice that the first line of
code in this subroutine reads in the current record. Use other routines to move around
in the table (like the TOP,BOTTOM, NEXT and PREVIOUS buttons in this demo). Making the
routine position independent means that it can be used and re-used at any time to fill inn
your form with information from any record in your database.
We will fill in the form now:o
Address"
State"
Phone"
InsertRec
Here we transfer the information from the Visual Basic Form and insert it
into the database table.
To do this requires a three-step process for each field in the database table:
1. Specify the name of the field of interest ---> DataTable.FieldNames
2. Specify the field value ---> DataTable.FieldValue = A String values
3. Put the field into the DataTable record ---> DataTable.Action = PutFieldl
We do this for each field in the database table.
When we are finished we INSERT the record into the
database table ---> DataTable.Action = InsertRecord
Address"
State"
Phone"
InsertButton_Click
ClearButton_Click
This code simply clears the text in all of the Visual Basic form's Text controls..
TopButton_Click
The following code moves to the first record in the data basee
and fills in our form with the information found in that first
record
BottomButton_Click
The following code moves to the last record in the data base
and fills in our form with the information found in that lastt
record
NextButton_Click
The following code moves to the next record in the database table. If an
error is encountered during the move to the next record an error message is displayed.
The DisplayError subroutine is an example of the structure of a generalizedd
DataTable error handling routine..
Once the repositioning to the next record is successfull, we fill in our formm
with information from that record.
Moving to the next record in the databaseu
If an error 
Display the DataTable errore
If no error
Fill in our form with the information in the record.
PreviousButton_Click
The following code moves to the previous record in the database table. If an
error is encountered during the move to the record an error message is displayed.a
The DisplayError subroutine is an example of the structure of a generalized 
DataTable error handling routine. 
Once the repositioning to the previous record is successfull, we fill in our formm
with information from that record.
Moving to previous recordM
If an errors
Display the DataTable Error 
If no error
Fill in our form with info from the record
DeleteButton_Click
This code deletes the current record from the database
The current record after the delete is performed, is the record immediatelyy
following the deleted record. We then fill in our form with info from that
record..
We will delete the current record.
Now fill in form with the current record.n
UpdateRec
Here we transfer the information from the Visual Basic Form and update the
current record in the database table. 
To do this requires a three-step process for each field in the database table:
1. Specify the name of the field of interest ---> DataTable.FieldNames
2. Specify the field value ---> DataTable.FieldValue = A String values
3. Put the field into the DataTable record ---> DataTable.Action = PutFieldl
We do this for each field in the database table.
When we are finished we UPDATE the record into the
database table ---> DataTable.Action = UpdateRecordd
Address"
State"
Phone"
UpdateButton_Click
DisplayError
This code is an examle of a DataTable error handling routine..
It is not a complete error routine but a small example intendedd
to show how a DataTable error routine can be implemented..
Drive not ready!
Directory not found!
File is busy!"
File is Locked!"
File not Found!"
End of Table!"
Start of Table!"
Unknown Error!