The SWF To Image ActiveX library is made using managed Windows 32-bit code so as a result library (dll) can not be loaded into 64-bit application.
Solution is to build application for x86 platform so application will be operate in 32-bit mode (will work on both 32 and 64-bit OS)

To apply this in Visual Studio 2005 and higher:

- open project in Visual Studio 2005
- open project settings by pressing ALT+F7 (or via main menu: Project | Windows Application 1 Properties)
- select "Build" tab
- change "Platform Target" to "x86" option
- re-build project

Produced EXE application will work OK with registration-free scenario on Windows x64. To see how to add registration-free support into application see below:

For registration-free usage scenario for SWF To Image please use the following manifest file:

Content of YourApplication.exe.manifest file:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">

<file name="SWFToImage.dll">
<typelib tlbid="{F52B2898-3CD9-4530-8F1E-2762A2783C33}" version="1.0" helpdir="C:\WINDOWS\system32\"/>
<comClass description="CLASS_SWFToImage" clsid="{479A1AAC-C148-40BB-9868-A9773DA66AF9}" progid="SWFToImage.SWFToImageObject" threadingModel="both" tlbid="{F52B2898-3CD9-4530-8F1E-2762A2783C33}" />
</file>
</assembly>

Do not forget to put SWFToImage.dll into the same folder where YourApplication.exe is located