Tutorial 6 A,B,C
Tutorial 7 A,B,C
Tutorial 8 A

Review of Sequential Access Files

	can only read OR write
	variable length records

	open "a:\file.txt" for Append as 1

	write #1, txtCityName.text, txtZipCode.text
	print #1, txtCityName.text, txtZipCode.text

	close 1

	open "a:\file.txt" for Input as 1

	input #1, strCityName, strZipCode


	Modes for opening SAF

		Append - creates if it doesn't exist
							add to the end of the file
							
		Output - creates if it doesn't exist
							deletes if it does exist

		Input  - reads from a file
							causes error if doesn't exist

Random Access Files

	Can read and write to file
	Fixed length records

	open "a:\test.txt" for Random As 1 Len = 10
	open "a:\test.txt" for Random As 1 Len = Len(udtItemRec)

	Put #1, intRecNum, udtItemRec
		used for writing to a file
		
	Get #1, intRecNum, udtItemRec
		used for reading from a file
		
	Close #1

User Defined Type

	Like a collection of fields
	Must be defined in a code module

String Manipulation - see lecture notes

Dialog Boxes

	CancelError property
	
	ShowColor
	ShowSave
	ShowFont
	ShowPrinter
	ShowOpen

	Flags property
	Filename
	Filter

				each filter is two parts separated by |
				
					First part is for user, appears in dropdown
					Second part used by program, specific syntax
				
						.Filter = "All Files | *.*"

				additional filters separated by |
				
						.Filter = "Text Files (*.txt) | *.txt | All Files | *.*"
				

Error Trapping

	Public Sub cmdOpen_Click()
		On Error Goto cmdOpen_Err
		
		
		Exit Sub
		
	cmdOpen_Err:


	End Sub