Sylvain,
Go to the files section here and look for FoxReg.exe. Download it and extract the .reg file inside. Run the .reg file to fix your registry settings. This usually takes care of the problem.
>I did register ComCtl32.OCX and it indicated success, but I still got the same error message from VFP.
>
>>I believe it's comctl32.ocx you need to register.