Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

writefile API

Posted on 1998-12-16
7
Medium Priority
?
481 Views
Last Modified: 2008-03-17
How do I send a file to a comm port using the writefile() API in VB4?
0
Comment
Question by:AndrewLindsay
[X]
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
7 Comments
 
LVL 13

Expert Comment

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


0
 

Author Comment

by:AndrewLindsay
ID: 1450862
VB4 32 Bit, as far as I can tell, is a 32Bit environment, and can use the 32Bit API.
0
 
LVL 13

Expert Comment

by:Mirkwood
ID: 1450863
Hmm, I always thought that it was 16bit. My mistake.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 

Author Comment

by:AndrewLindsay
ID: 1450864
VB4 Has both a 16Bit and 32Bit environment.  The 32Bit API calls are valid for the 32Bit environment.
0
 
LVL 8

Expert Comment

by:MikeP090797
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?
0
 

Author Comment

by:AndrewLindsay
ID: 1450866
MikeP,

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.
0
 
LVL 8

Accepted Solution

by:
MikeP090797 earned 150 total points
ID: 1450867
Type OVERLAPPED
 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
S="Data"
Dim L as long
WriteFile(hFile, S, Len(S), L, vbNull


0

Featured Post

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!

Question has a verified solution.

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

When designing a form there are several BorderStyles to choose from, all of which can be classified as either 'Fixed' or 'Sizable' and I'd guess that 'Fixed Single' or one of the other fixed types is the most popular choice. I assume it's the most p…
Enums (shorthand for ‘enumerations’) are not often used by programmers but they can be quite valuable when they are.  What are they? An Enum is just a type of variable like a string or an Integer, but in this case one that you create that contains…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
Suggested Courses

636 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