Passing property values to controls embedded inside of user controls?

I want to use codebehind to pass property values to a control that I've embedded INSIDE of a user control.

In other words, let's say I have the following:

MyPage.aspx

...with the following control placed on it...

MyUserControl.ascx

... and inside of MyUserControl.ascx, is an instance of ....

MyCommercialUploadControl1

I want to be able to write a property to the embedded commerical component:

MyCommercialUploadControl1.TargetFolder

I want to be able write this property programmatically from the aspx page that originally called the instance of MyUserControl, as follows:

[from MyPage.aspx]

MyUserControl.TargetFolder = @"c:\whatever";

Failure #1: I attempted to add logic to the codebehind for my .ascx that read the value of a property attached to itself, and then mapped that value to the embedded commercial control, e.g.

MyCommercialUploadControl1.TargetFolder = this.TargetFolder

// "this" refers to the ascx instance

This did not work.

Failure #2: I experimented with various scenarios involving doing the mappings onPreInit, thinking I might be running into a page lifecycle issue. This did not work either.

I can successfully write properties to the user control itself, but I haven't figured out how to write properties to controls INSIDE of the control. In all cases the debugger indicates null values where I want my properties to end up. Can anyone help?

Thank you.

-KF

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