?
Solved

Altering form and control properties via dll

Posted on 2006-06-13
4
Medium Priority
?
150 Views
Last Modified: 2010-04-30
Does anyone have any best practice, as it pertains to altering a form control property from a referenced dll?

For example, if I have a dll that gets called and is running a process... and I want a label in the calling form to say "please wait, processing" (caption property)...

But I do not want to change any code on the form... just do it from the dll class file.

Thanks
0
Comment
Question by:born4code
[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
  • 2
4 Comments
 
LVL 13

Expert Comment

by:Mark_FreeSoftware
ID: 16898396

you can try somthing like this:

in your dll:

Public Sub update(lbl As Label, yourstuff As Variant)
   lbl.Caption = "Loading, please wait!"
End Sub



in your app:

Private Sub Command1_Click()
   update Label1, "your data and other things here"
End Sub
0
 
LVL 2

Author Comment

by:born4code
ID: 16898530
Yes, but if I am handling events then I don't have the luxury of passing the control variable.  That would be the obvious choice.  I am using a control handler... let say in the class I have...

Public Sub cmdUpdate_Click()  '<<<< handles the click event, no params passed
'something here
End Sub

?
0
 
LVL 13

Accepted Solution

by:
Mark_FreeSoftware earned 2000 total points
ID: 16898555

actually you can, but then use a public variable:

Dim outputlabel As Label

Private Sub Command1_Click()
   Set outputlabel = Label1
End Sub

Private Sub Command2_Click()
   outputlabel.Caption = "test"
End Sub


first press button one, (can be done in form load for example)

then press button 2,

the caption of label 1 is changing now.....
0
 
LVL 2

Author Comment

by:born4code
ID: 16899314
Ah... okay, what I did was put the declaration right inside of my Class file, and then set it in the form load of the page.  Then I can access it directory from the class.  Duh!

Works good this way.  The only thing that stinks is that it sure would be nice to pull it somewhere from an object elsewhere... I did experiment with VB.Forms object... and if I use the form name I can trace it down that way as well.


Thanks
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

Introduction In a recent article (http://www.experts-exchange.com/A_7811-A-Better-Concatenate-Function.html) for the Excel community, I showed an improved version of the Excel Concatenate() function.  While writing that article I realized that no o…
If you have ever used Microsoft Word then you know that it has a good spell checker and it may have occurred to you that the ability to check spelling might be a nice piece of functionality to add to certain applications of yours. Well the code that…
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…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…
Suggested Courses

752 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