Wrap I/O for Text Files

In a production application, every time you want to access a file for reading or writing, you must retrieve a free handle using the FreeFile() function to ensure you don’t overwrite an existing handle. You also must remember to close the file after you finish with it. In some cases, you can avoid the trouble by encasing this functionality inside utility functions. For example, I wrote these two functions to go between strings and text files in my apps:

 Public Function ReadFile(FileName As String) As String	Dim hFile As Integer	hFile = FreeFile	On Error GoTo ErrorTrap		Open FileName For Input As #hFile		ReadFile = Input(LOF(hFile), hFile)		Close # hFile	Exit FunctionErrorTrap:	ReadFile = ""End FunctionPublic Sub WriteFile(FileName As String, Contents As 	_	String)	Dim hFile As Integer	hFile = FreeFile	On Error Resume Next	Open FileName For Output As #hFile	Print #hFile, Contents;	Close #hFileEnd Sub

Once you put these functions in your project, you can read and write text files quickly. For example, here’s a way you might use these functions to copy text files:

 Call WriteFile("c:.txt", ReadFile("c:a.txt"))
Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS