Control Toolbox appears out of thin air

[Josh Sale]

I have an Excel add-in that has a number of forms. One of the forms
contains a tab control and one of the tabs contains a frame that includes: a
checkbox, a couple of comboboxes and an option control.

If the user unchecks the checkbox my code disables (.Enable = False) the
comboboxes and option control.

If after unchecking the box the user then clicks in the disabled combobox,
Excel's Controls Toolbox dialog/toolbar (the floating toolbar you use to
place textboxes, labels, etc onto a form but not the dialog/toolbar you use
to place controls onto a worksheet) pops up! Once this dialog/toolbar is
there its not like you can do anything with it (e.g., you can't drag a
textbox onto the form being displayed).

This only happens under Excel 2000 and later. It doesn't occur under Excel
97.

My code doesn't do this on purpose ... I wouldn't know how.

Any suggestions on how to eliminate this behavior?

TIA,

josh

 

[Josh Sale]

Upon closer reflection, I see that its really the Forms Toolbar that's
popping up and not the Control Toolbox. I still have no idea why its
happening.

 

[J C via OfficeKB.com]

I am experiencing the exact same problem in MS Project 2003. The Toolbox appears for no apparent reason while tabbing through options on a userform. Would love to hear a solution...

 

[Josh Sale]

I wish I could say that I found one ... but I haven't! Please post back to
the group if you figure it out.