32 to 64 bit


Well-known Member
Someone has asked if an App I have can work in their 64 bit Office. (I think it's the online one).

I installed 64 bit office 2010 onto my laptop to find out. Running the xlsm file brings up a pile of problem but I did manage to alter all the Functions to ptrsafe Functions.
Then there are lots of Missing references and these have me stumped. First one is MSCOMCTL.OCX so I locate it in C:\Windows\SysWOW64 and register it with regsvr32. It reports success and 'MISSING' goes away - until I close and reopen the References dialog, where it again shows as MISSING.

Am I doing something wrong, or is there more to it ?


Well-known Member
I googled "64 bit MSCOMCTL.OCX" and found a collection of options to correct similar problems. I am not sure which would be applicable for your situation.
I am running Excel 2010 on Win7. The version of 64 bit MSCOMCTL.OCX that I have is and its reference in the VBE does not become unchecked.


MrExcel MVP, Moderator
No version of the Common Controls library will work in 64bit Office.

Not sure what you mean by "the online one", but the online version of Excel will not run VBA at all (and bitness would be irrelevant).


Well-known Member
My apologies I was in error. I had installed Office 2016/64 bit on my home system and removed it due to the (IMHO) poor interface (in the File menu - lack of frequently used folders; overlarge spacing of the Quick Access Toolbar icons & worksheet tabs; removal of the goto first/last tab buttons, etc.) and general instability. When I made my comment in post 2 I was looking at my Office 2010/32 bit installation not the 2016 version taht I use at work.

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