referring to objects using string variables?

Hi,

Is there a method to check the value stored (or displayed) in a textbox (or combobox) using the name of the textbox(or combobox) stored in a string variable?

Example: Something like this...
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Dim ObjectName as String, EnableButton as Boolean, I as Integer
ObjectName= Cells(I, 2).Value

For I = 0 to UserFormName.Controls.Count = "" then
If not UserFormName.ObjectName.Value = "" then
EnableButton =true
EndIf
Next I
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