So I have a dll built with two separate functions within. I would like to call 
the DLL once before the UI and have it return a value, have a different section 
of the UI called based on the value returned from the DLL, and then once the UI 
is called, if the user chooses an option, to call the second function in the 
DLL.


I am not sure if this is possible.

Is there a way to only go to a certain UI screen if a DLL returns a value (when 
all my UI is in a wixlib?)

I have an idea that I should be able to use a publish event somewhat like this 
to call the second portion of the DLL

<Publish Event="DoAction" Value="CallDLL">DLLfunction</Publish>

<CustomAction Id="DoAction" Filekey="foo.dll" Return="asyncNoWait" />

<RadioButtonGroup Property="DLLfuction">
<RadioButton Value="1">
<RadioButton Value="2">

So If the users clicks button 1, it should pass 1 into my DLL, and if they 
click 2, it should pass 2 in correct?
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