You cannot run 32-bit ActiveX controls in the 64-bit version of InfoPath, or 64-bit ActiveX controls in the 32-bit version of InfoPath

You develop an InfoPath form template that includes an ActiveX control. You observe either of the following symptoms:

• All people who use InfoPath 2007 see the ActiveX control, however, only some of the people who use InfoPath 2010 see the ActiveX control. Instead, there is a red X where the control should display.
• None of the people who use InfoPath 2007 see the ActiveX control, and only some of the people who use InfoPath 2010 see the ActiveX control. Instead, there is a red X where the control should display.

You cannot install or run a 32-bit ActiveX control in 64-bit InfoPath. The display engine used by 64-bit InfoPath is not capable of running or hosting a 32-bit ActiveX control. You will see the same issue if you try to run the control in 64-bit Internet Explorer.

Similarly, you cannot install or run a 64-bit ActiveX control in 32-bit InfoPath.

To resolve this problem, make a copy of the ActiveX control project and redesign it to target the other architecture. For example, if you have a 32-bit ActiveX control, redesign a copy of it for 64-bit environments. Then integrate the new control in one of the following ways:

• If everyone who uses the form runs 64-bit InfoPath, modify the InfoPath form template and replace the 32-bit ActiveX control with the 64-bit ActiveX control. Publish the new form.
• If some people who use the form run 32-bit InfoPath and some run 64-bit InfoPath, you need two form templates. One form template will include the 32-bit ActiveX control and should be used by those filling out the form with a 32-bit release of InfoPath. The other form template will include the 64-bit ActiveX control and should be used by those filling out the form with a 64-bit release of InfoPath. To provide this, make a copy of the InfoPath form template. In this copy, replace the original ActiveX control with the redesigned ActiveX control. Publish the new form template, and modify any links, as needed.

Note: You must maintain both versions of the form template in a mixed-version environment.

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