I've written a project in Visual Basic 6.0 and on some clients, to a greater or lesser extent, they get the error "Can't show non-modal form when modal form is displayed" when no modal form is displayed/loaded.
- I've tried code to detect all forms loaded in the project when this occurs but none are returned, besides the MDI and non-modal child(s). eg I've used the Forms collection.
- This error never occurs on our development PCs
Q1. Has anyone come across this issue or heard of a relevant bug in VB?
Q2. If there is 2 or more instances of the same program open, could this cause the error?
Q3. If there is 2 or more instances of different VB programs open, could this cause the error?
Q4. We have instant messaging freeware installed ICQ, could this cause the error?
Q5. Could Outlook being open cause the error?
I have been struggling with this for many years without any joy?
P.S. Please do NOT paste in a MSDN description of "Can't show non-modal form when modal form is displayed"