topic SetBuddyControl error : specified cast is not valid in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/setbuddycontrol-error-specified-cast-is-not-valid/m-p/527137#M14203 <HTML><HEAD></HEAD><BODY><SPAN>I'm a bit new to the ArcEngine programming (but not AO) and I've just ported a poorly organized .sln into a new one, reorganizing namespaces and such but not really changing any code. </SPAN><BR /><BR /><SPAN>Now, I get "Specified cast is not valid" when trying to set a TOC's buddy control to an subclass of AxMapControl.&nbsp; I'm able to successfully cast the custom control to AxMapControl so I feel like the underlying issue is not there.</SPAN><BR /><BR /><SPAN>Also, after looking at the exception that it's throwing I notice that the actual error is coming from </SPAN><BR /><BR /><SPAN>Marshal.GetIDispatchForObject(_mapControl);</SPAN></BODY></HTML> Thu, 12 May 2011 13:55:01 GMT kyleknoche 2011-05-12T13:55:01Z SetBuddyControl error : specified cast is not valid https://community.esri.com/t5/arcobjects-sdk-questions/setbuddycontrol-error-specified-cast-is-not-valid/m-p/527137#M14203 <HTML><HEAD></HEAD><BODY><SPAN>I'm a bit new to the ArcEngine programming (but not AO) and I've just ported a poorly organized .sln into a new one, reorganizing namespaces and such but not really changing any code. </SPAN><BR /><BR /><SPAN>Now, I get "Specified cast is not valid" when trying to set a TOC's buddy control to an subclass of AxMapControl.&nbsp; I'm able to successfully cast the custom control to AxMapControl so I feel like the underlying issue is not there.</SPAN><BR /><BR /><SPAN>Also, after looking at the exception that it's throwing I notice that the actual error is coming from </SPAN><BR /><BR /><SPAN>Marshal.GetIDispatchForObject(_mapControl);</SPAN></BODY></HTML> Thu, 12 May 2011 13:55:01 GMT https://community.esri.com/t5/arcobjects-sdk-questions/setbuddycontrol-error-specified-cast-is-not-valid/m-p/527137#M14203 kyleknoche 2011-05-12T13:55:01Z