unable to view the acctrl.dll in com references on 64-bit

[Anonymous]

We want to bring in the autocad control window i.e the Activex object acctrl.dll on to a form. when we want to add this activex control on the from on a 64-bit operating system (windows 7) and autocad version 2012 and vstudio 10 , we are unable to view this control in the toolbox items itself,even after registering the acctrl.dll control. we are using the frame work 4.0 of .net version 2010. when we click the toolbox,right click and select choose items, then click the COM components tab we are uanble to view the acctrl.dll.

[norman.yuan]

That is because Visual Studio is a 32-bit applicationthat cannot load 64-bit COM interop into its form designer. This post might be of help:

http://adndevblog.typepad.com/autocad/2012/07/use-64-bit-activex-component-from-a-net-assembly.html