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UserControl - Property Set vursus Property Let?

Posted on 2006-07-07
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Last Modified: 2008-02-26
I am trying to create a OCX and am having trouble with setting the Properties. Can someone explain (with workong examples) the differences between using 'Property Set' and 'Property Let' ?

bdb
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Question by:bdbrown
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Jim Horn earned 125 total points
ID: 17058974
Property Set is when you are using an Object as a property (Recordset, Collection, etc.)

Property Let is when you are using a non-object as a property (Integer, Variant, String, etc.)
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by:bdbrown
ID: 17059007
Thanks Jim for the clarification,
So how would I go about setting the background of my control to a different colour at design time and have it stay that colour when I run the app? Would that be a Object or non-Object property?
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Expert Comment

by:Jim Horn
ID: 17059041
BackColor by itself is often a Long Integer, so that would be Property Let.

Some controls actually have a .Font object property which contains font, size, bold/italic/etc, which would be Property Get.

What control are you using?
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by:bdbrown
ID: 17059124
I am creating my own OCX control and want to make avalible some of these format and display properties at design time. When I open the form which the contol is placed, the values that I set at design time reset back to the default settings again. How can I assign default values and still allow the user to set properties at design?
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Assisted Solution

by:danaseaman
danaseaman earned 125 total points
ID: 17063270
Sounds like you are not persisting the new values via PropertyBag  UserControl_ReadProperties and UserControl_WriteProperties. Without this your control will always use the default values or you need to set everything at run-time.

Take adantage of Vb Add-In "ActiveX Control Interface Wizard" which will set all this up correctly.
 
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by:bdbrown
ID: 17081820
Dan; I am going to have to take some time to figure out this properties bag thing but I am sure the answer is in there.

Thanks for the help Jim and Dan - I have increased the points and will split between both of you.

bdb
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