Solved

Starting Screen Saver

Posted on 1998-08-30
2
149 Views
Last Modified: 2010-04-30
Hi,
I am using VB5 and want to start the users screen saver
under _windows 98_ (the command should work under 95/NT too, but 98 is primary concern).  I had code before that started it under 95/NT, but under 98 it seems to put the computer in 'standby' mode or something.  I am sure it is just a case of know the correct API function and the value(s) to pass it.

Thanks,
oreg
0
Comment
Question by:oreg
[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
2 Comments
 
LVL 1

Accepted Solution

by:
jf26028 earned 90 total points
ID: 1431942
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Const WM_SYSCOMMAND = &H112&
Const SC_SCREENSAVE = &HF140&


To start the screen saver, use the following code:

Dim result As Long
result = SendMessage(Form1.hWnd, WM_SYSCOMMAND, SC_SCREENSAVE,0&)      
0
 

Author Comment

by:oreg
ID: 1431943
Hi,

I am SOOO sorry it took so long to grade this...It was not working for me right away...I found out my problem was that I forgot a 'byval' in the last argument to sendmessage...sheesh, who would have thought that simply changing byval would have two very different, but safe (standby vs screen saver).

Thanks!
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

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…
Background What I'm presenting in this article is the result of 2 conditions in my work area: We have a SQL Server production environment but no development or test environment; andWe have an MS Access front end using tables in SQL Server but we a…
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…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

707 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