writefile API

Posted on 1998-12-16
Last Modified: 2008-03-17
How do I send a file to a comm port using the writefile() API in VB4?
Question by:AndrewLindsay
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
LVL 13

Expert Comment

ID: 1450861
Sorry not possible in VB4.
You need a 32 bit development platform like VB5 to use writefile


Author Comment

ID: 1450862
VB4 32 Bit, as far as I can tell, is a 32Bit environment, and can use the 32Bit API.
LVL 13

Expert Comment

ID: 1450863
Hmm, I always thought that it was 16bit. My mistake.
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

ID: 1450864
VB4 Has both a 16Bit and 32Bit environment.  The 32Bit API calls are valid for the 32Bit environment.

Expert Comment

ID: 1450865
Out of curiosity: why to use WriteFile, when you can use Print or any other VB function to write to COMM ports, or even to use the COMM control for that?

Author Comment

ID: 1450866

The reason is that I not really programming in VB, I am using PowerBasic for a DLL in VB to give a bit of qa speed increase.

Accepted Solution

MikeP090797 earned 50 total points
ID: 1450867
 Internal As Long
 InternalHigh As Long
 offset As Long
 OffsetHigh As Long
 hEvent As Long
End Type

Declare Function WriteFile Lib "kernel32" Alias "WriteFile" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, lpOverlapped As OVERLAPPED) As Long

Dim S as string
Dim L as long
WriteFile(hFile, S, Len(S), L, vbNull


Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
VBA filters 2 73
VBA: Personal Macro Retain/Highlight/Remove values in a selected column 4 36
RUNRMTCMD from AS/400 13 102
Set WorkSheet  not Working 9 53
The debugging module of the VB 6 IDE can be accessed by way of the Debug menu item. That menu item can normally be found in the IDE's main menu line as shown in this picture.   There is also a companion Debug Toolbar that looks like the followin…
Article by: Martin
Here are a few simple, working, games that you can use as-is or as the basis for your own games. Tic-Tac-Toe This is one of the simplest of all games.   The game allows for a choice of who goes first and keeps track of the number of wins for…
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Get people started with the utilization of class modules. Class modules can be a powerful tool in Microsoft Access. They allow you to create self-contained objects that encapsulate functionality. They can easily hide the complexity of a process from…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question